Sbc intake torque specs aluminum heads

I just saw a set of these ZZ4 heads on ebay, the aluminum 1.94/1.50 58cc L98 D-port style heads for sale. I have read all over that they are good heads, and with a roller cam .474/.510 and 208*/221* @ .050" they make 355 HP/410 TQ with 10:1 compression. The thing is that the ebay ad says: very clean. not much use.

On the plus side, the Vortec intake port flows 42 cfm better than the stock heads at 0.500-inch lift and 18 cfm better on the exhaust side. Vortec Iron, Scoggin-Dickey Modified PN SD8060A2, $779. ...It is not necessary to re-torque the head bolts after initial break-in. For head stud installation, follow the head stud manufacturer’s instructions. NOTE: On engines with torque-to-yield head bolts (1992 ½ and later), the head bolts must be replaced. 6) Installing and Adjusting the Valvetrain Place the proper length, hardened pushrods into the11 Nov 2017 ... It's official: the “How to Build Your First Engine Series” is over! This is the final episode, as David Freiburger and Steve Dulcich wrap up ...The torque specifications for Chevrolet 350 cubic inch V8 head bolts are 65 foot-pounds per bolt if securing the stock cast iron head. Aftermarket aluminium heads have unique torqu...Recycling aluminum cans is a way to make money on the side. If you could collect 1,000 cans per week, you would make $100 per week. Home Make Money One of the ways you might be ab...Posted 05/31/18 by OnAllCylinders Staff. Last updated on 12/29/2021. The L92 is a 6.2L, Gen. 4, small block engine used in GM luxury trucks and SUVs between 2007 and 2008. For marketing purposes, it was also known as the Vortec 6200. The information listed here is for a stock L92 engine. Mechanically similar, General Motors’ LS and LS-based ...

I just saw a set of these ZZ4 heads on ebay, the aluminum 1.94/1.50 58cc L98 D-port style heads for sale. I have read all over that they are good heads, and with a roller cam .474/.510 and 208*/221* @ .050" they make 355 HP/410 TQ with 10:1 compression. The thing is that the ebay ad says: very clean. not much use.You have spoken and we have listened… these small block Chevy compatible heads offer the only two things that matter… performance and price! The features for the IK® 180 / 200 include a revolutionary ultra casting, versatile 180 cc, 200 cc, and 215 cc intake ports that are specifically designed for optimum versatility, and 64 cc or 70 cc ...Intake Manifold, Vortec Head Design. Designed for 283-400-cubic-inch engines using Vortec cylinder heads P/N 12558060, P/N 19300956, P/N 19300955, P/N 19331470, or P/N 19331472. Has 4-bolts per side to attach it to these cylinder heads. Aluminum high-rise design maximizes horsepower and delivers a broad torque curve.Hello all, I just bought a set of aluminum heads to install on my 406 sbc. My question was are the torque specs. different on aluminum heads as to the stock cast iron heads?Torque Specs for Small Block Chevy Engines Part Bolt Size Minimum Maximum Camshaft Sprocket 5/16"-18 15 ft. lbs. 25 ft. lbs. Connecting Rod 3/8"-24 30 ft. lbs. 35 ft. lbs.

Received 18 Likes on 15 Posts. Re: Best Torque for Intake to Aluminum Head Bolts? (GRX) I use 35# with my aluminum heads. Let them sit for a while then re-torque them since the gasket will take a set and the torque will fall off. Occasionally I have to do this a few times until the torque holds. Jake.5 Best Aluminum Heads for Small Block Chevy. No comment (s) 4.3 (86%) 20 vote [s] DNA Motoring CYLH-SBC-350. High Grade Aluminum, Bronze Valve Guides, Hardened Seats. 200 Cc Intake Runner With A 68 Cc Combustion Chamber. Lighter Than Iron Heads. Check Price. Replacement for Chevy Small Block SBC 200Cc.1 – 3/8-18 NPT Pipe Plug. DESCRIPTION: The Edelbrock RPM Air-Gap #7116 intake manifold has been designed for 262-400 c.i.d. small-block Chevy engines equipped with Vortec style (L31) cylinder heads. The manifold accepts late model water neck, air conditioning, alternator and H.E.I. ignition systems. Use electric or manual type choke …Apr 10, 2013 · I have aluminum heads and aluminum intake ,I used ARP head studs ,intake bolts and header bolts ,the intake is torqued to 35 lbs exaust to 35 lbs and safety wired heads 90 &80 , The Aluminum Heads are not the problem ,it is the torque yield of the fastners ,use good quality fastners ,Felpro no retorque gaskets,you will not have a problem,on the small block make sure the intake bolts are long ...

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Our 1402 and 1472 cylinder heads are machined for 7/16" head bolt diameters; all others are machined for 1/2" head bolts. When using heads with 1/2" holes on blocks with 7/16" threads, we recommend using ARP's 254-3708 or 254-4401 kit with their 200-8598 bushings. If you are using ARP hardware, follow their recommended torque specifications.Comes fully assembled with heavy duty components. Designed to bolt right up to your small block Chevy engine. Features an all-aluminum construction with a natural finish. Head bolts are tested to over 180,000 PSI and has a 1/2" wrench size and a 1.375" thread length. Head gaskets offer superior heat dissipation and have a compression thickness ...The BRODIX 18X offers the best of both worlds, 18° horsepower without using expensive shaft rockers or offset lifters. This head offers a dramatic horsepower increase over the previous 23° cylinder head. Several advantages of the 18X are intake ports that flow over 320 cfm out-of-the-box, an intake valve size of 2.140, raised intake ports ...aluminum manifold, aluminum heads, bolt torque. Jump to Latest Follow. 38K views 8 replies 6 participants last post by 1BAD80 Nov 7, 2004. W. william27103 Discussion starter. 137 posts · Joined 2004. #1 · Nov 6, 2004. I can't find the torque specs for an aluminum intake manifold on aluminum cylinderheads anywhere. Can any of you guys help me?Aug 5, 2023 · Bolt Tightening Order And Pattern For Chevy 350 Intake Torque Specs. Step one. Disassembly. Disconnect your battery and drain all coolants. Next, remove all peripheral items: cases in point are fuel lines, engine covers, vacuum lines, wiring connectors, EGR tubes, air intake, and throttle cable.

It will crack! (Dont ask how I know). If I remember correctly it was 11 ft-lbs. Most torque wrenches dont go that low, so I just white knuckle them and consider it good. Will Stewart. '71 Malibu, 383 ci, Vortec heads 280H cam, TH400/2400 stall converter and 10 bolt/3.73 gear and Eaton posi. Save Share.The MTX Blue Thunder 10 is a car-audio subwoofer. The subwoofer prevents distortion without reducing power. The Blue Thunder subwoofer is small in size and has a sleek design, but ...I am going to clean up the threads and see what happens but wanted to know how much torque can the threads handle. I do not want to remove intake and all the other stuff. Call me a lazy. Retorqued at 11 ft lbs the motor idles at 1400rpm, obviously an intake leak. If retorqued to 30 ft lbs will stop intake leak maybe.18123 posts · Joined 2002. #4 · Dec 30, 2010. it is NOT the same specs as a regular small block chevy. if you try to torque the correct flanged vortec intake bolts to 30 lb ft, you will wind up snapping the bolts. i believe the proper spec is something like 15 lb ft, but i just used my short 3/8" ratchet and snugged them down on my Nova and ...Tapered Seat Plugs. Step One. Install the new plug finger tight, and complete the installation with a torque wrench. Note: If using a torque wrench vs. plug wrench, please refer to the Torque Recommendations chart below. Step Two. Turn Finger Tight. A tapered seat plug does not use gaskets and requires one-sixteenth (1/16) turn.E. ericnova72. 22557 posts · Joined 2007. #3 · Aug 1, 2015. Spec for the SBC is 65-70 ft.lbs with factory bolts.....75 ft.lbs isn't going to hurt anything....but if you want to re-torque, it is a good idea, you will find that the gasket has relaxed some under the compressive force of the head, and you will find some bolts seem looser, usually ...Flo-Tek Assembled SBC Aluminum Head (two quantity) VS Racing Gen2 67/62 Cast Turbo; ... 350 SBC torque build list components using a late-model 1-piece rear main seal four bolt main roller block. ... 1957-86 SBC Chevy Intake Manifold, Dual Plane, High Rise, RPM, 350. View (42) $161.09Chevrolet Performance Fast Burn Bare Aluminum Cylinder Head, Small Block Chevy. Fast Burn Bare Aluminum Cylinder Head. Small Block Chevy. 210cc Intake Ports. 62cc Combustion Chambers. Valves: 2.000 in. Intake/1.550 in. Exhaust. Sold Individually. View Details. $887.46.

289, 302, 351W, Assembled Cylinder Head Style, Aluminum. Features hardened locks and retainers. Head is compatible with most roller camshafts. Includes high-temp exhaust seats and bronze guides. Made from lightweight, yet strong aluminum with a natural finish. Intake valve diameter measures 1.940" and the exhaust valve diameter measures 1.540".

Analysts have provided the following ratings for Reliance Steel & Aluminum (NYSE:RS) within the last quarter: Bullish Somewhat Bullish In... Analysts have provided the fol...Small Block Ford Intake Bolt Torque Specifications. 18 Ft/Lbs - Aluminum Heads. 22-25 Ft/Lbs - Iron Heads. Do the torque in 2 steps, first just hand tight, second with the torque wrench. IF you do have a spec from the manufacturer follow that. Make sure threads in the head are clean and in good. shape.Full-CNC. Speedmaster™ CNC ported cylinder heads are machined on dedicated 4-axis and 5-axis CNC machining centers to ensure accuracy and cost effectiveness. Combustion Chamber, Exhaust and Intake Ports all fully CNC machined for better flow. CNC combustion chambers offer superior control over flame travel and quench area. Small Block Chevy Head Bolt Torque Specifications. Step 1 25 Ft/Lbs. Step 2 45 Ft/Lbs. Step 3 65 Ft/Lbs. For Head Studs or aftermarket bolts CHECK YOUR INSTRUCTIONS, SBC studs are available in a ton of. different styles depending on heads and stud diameters. Some People do only 1 or 2 steps to reach the final torque. 22 Jun 2008 ... sbc aluminum heads only take 55/60 ft lbs torque. You know better than that. And you MUST have sealant unless you have an aftermarket block ...Our 1402 and 1472 cylinder heads are machined for 7/16" head bolt diameters; all others are machined for 1/2" head bolts. When using heads with 1/2" holes on blocks with 7/16" threads, we recommend using ARP's 254-3708 or 254-4401 kit with their 200-8598 bushings. If you are using ARP hardware, follow their recommended torque specifications.Head History – The Evolution of Factory SBC Cylinder Heads To Gen IV. By Bobby Kimbrough October 16, 2015. The venerable small-block Chevy V8 engine has seen an amazing evolution in the past 60 years. From the early 265/283 displacement engines to the most popular engine of any era, the 350 SBC, all the way to the modern LS platforms …May 26, 2004 · 413 posts · Joined 2001. #1 · May 26, 2004. I'm now going to install my manifold and then headers onto my (pro topline) aluminum heads. I'm using ARP bolts for the manifold, and ARP studs for the headers. ARP says 39ft lbs, but I once stripped out a thread (P.I.T.A.) at 30ft lbs, so im definately wary of doing that again.

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600--650 vacuum secondary max rpm 5500 ,, VE 98%. alloy 195 cc heads. do a dynamic compression calc [includes cam timing ] but your static should be around 10:1 CR. single pattern 220deg in/exh at .050 camshaft prefer a Hyd roller. 1 3/4 primary headers 4 into 1 ,,, 3inch collector at least 18 inch long. NB Its all about what you will lose in ...Spark plugs. 14 mm. 25 ft. lbs. 25 ft. lbs. * Tips for proper installation of heads gaskets. 1) Cleaning. The most important operation of regasketing your engine is thorough cleaning of the cylinder head, block, bolts, and bolt holes. A dirty bolt can throw off torque readings by as much as 20 ft. lbs. 2) Watch bolt lengths.Various aluminum head vendors recommend 70 ft/lbs on bolts or studs. In the Corvette service manual, Chevrolet recommends different torque for the short, medium and long bolts. I tend to trust ARP, but 80 ft/lbs sounds sounds like a LOT of torque to apply to aluminum heads. The guy at ARP said that if you use their moly thread lube, you can ...The FloTek 180cc aluminum alloy casting cylinder heads are the answer. Featuring 180 cc ports with a unique design made for versatility, the FloTek SBC head is one of the best …Received 2 Likes on 2 Posts. Re: ZZ4 head bolt pattern and torque specs (Paul 73 Coupe) The torque sequence is the same as any small block. Start at the center between the two exhaust valves and work out from here. 65# of torque will work fine. Be sure to use lube on the underside of the bolt head and to use sealer on the threads.Mar 8, 2003 · HEAD BOLT TORQUE: Apply moly-oil mixture to washers, and area around head bolt to prevent galling and improper torque readings. Torque to 70 ft/lbs. for 7/16" bolts or studs (289 or 302) or 100 ft/lbs. for 1/2" bolts or studs (351W) in three or four steps following the factory tightening sequence. Head History – The Evolution of Factory SBC Cylinder Heads To Gen IV. By Bobby Kimbrough October 16, 2015. The venerable small-block Chevy V8 engine has seen an amazing evolution in the past 60 years. From the early 265/283 displacement engines to the most popular engine of any era, the 350 SBC, all the way to the modern LS platforms …Cylinder Head Bolts: M11 x 2.0 x 155.5: 22 ft.-lbs. 90 degrees: 90 degrees: M11 x 2.0 x 101.0: 50 degrees: M8 x 1.25 x 46.0--22 ft.-lbs. Rocker Arm Bolts--22 ft.-lbs. Intake Manifold Bolts: 44 in.-lbs.-89 in.-lbs. Oil Pump Bolts--18 ft.-lbs. Camshaft Retainer Plate Bolts ... Fasteners that list an angle are Torque to Yield (TTY). The specs ...Object moved to here.Maxx 200 SBC(Sold in Pairs) Maxx 200 SBC. (Sold in Pairs) $ 950.00 – $ 1,525.00. The Maxx 200 is the ultimate “as cast” head available that produces CNC type flow number, flowing over 280cfm. This head has produced over 550 hp on pump gas and mild cam .383. Spring Options. ….

HEAD BOLTS or STUDS: High quality head studs or head bolts with hardened washers must be used to prevent galling of the aluminum bolt bosses. Edelbrock Head Bolt Kit #8555 includes two longer-than-stock bolts which must be used with these cylinder heads. If you use any other head bolts, you must use the two head bolts and washers supplied 60 ft-lbs. Bellhousing. (Transmission to Block) Engine Oil. 25 ft-lbs. Small block chevy torque specifications for Main Caps, Connecting Rods, Heads, Cam Sprocket, Rocker Studs, Oil Pump, Timing Cover, Harmonic Damper, Valve Covers, Oil Pan, Exhaust Manifolds, Intake Manifold and Spark Plugs.Jun 2, 2012 · This is on a small block Chevrolet. I know Socket head cap screws will only fit in some places, because the Diameter of the cap screw head is too large and a 3/8 nut is larger ! 69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau ... Big Block Chevy Intake Bolt Torque Specifications. 25 Ft/Lbs – Aluminum Heads 35 Ft/Lbs – Iron Heads. The torque spec can be anywhere from 25-35 on Iron heads, but for aluminum I tend to go towards the lower side. IF you do have a spec from the manufacturer follow that. Make sure threads in the head are clean and in good shape. The GM 3.4 head bolt torque specs are as follows: First Pass 85 ft/lbs, Second Pass 106 ft/lbs, and Final Torque 107 ft/lbs. It is important to note that the head bolts must be tightened in three stages for proper installation of the cylinder heads on this engine model. It is also recommended that a new gasket set be used when performing …Mar 21, 2002 · Various aluminum head vendors recommend 70 ft/lbs on bolts or studs. In the Corvette service manual, Chevrolet recommends different torque for the short, medium and long bolts. I tend to trust ARP, but 80 ft/lbs sounds sounds like a LOT of torque to apply to aluminum heads. The guy at ARP said that if you use their moly thread lube, you can ... We upgraded the heads to a pair of TFS Super 23 aluminum castings to ensure we got the most out of each intake. The heads feature a 215cc intake port with 2.08/1.60-inch stainless-steel valves and ...E. ericnova72. 22557 posts · Joined 2007. #3 · Aug 1, 2015. Spec for the SBC is 65-70 ft.lbs with factory bolts.....75 ft.lbs isn't going to hurt anything....but if you want to re-torque, it is a good idea, you will find that the gasket has relaxed some under the compressive force of the head, and you will find some bolts seem looser, usually ... Sbc intake torque specs aluminum heads, Cylinder Head Bolts (Final Pass all M11 Bolts in Sequence-Excluding the Medium Length Bolts at the Front and Rear of Each Cylinder Head) 90 degrees: Cylinder Head Bolts (Final Pass M11 Medium Length Bolts at the Front and Rear of Each Cylinder Head in Sequence) 50 degrees: Cylinder Head Bolts (M8 Inner Bolts in Sequence) 22 lb ft: Engine ..., 289, 302, 351W, Assembled Cylinder Head Style, Aluminum. Features hardened locks and retainers. Head is compatible with most roller camshafts. Includes high-temp exhaust seats and bronze guides. Made from lightweight, yet strong aluminum with a natural finish. Intake valve diameter measures 1.940" and the exhaust valve diameter measures 1.540"., When the block is 0 decked and the heads are decked more than about .025". The corner studs can be too close to the center requiring that the holes are opened a bit. Cutting the manifold flange or cylinder head intake flange does not change this but will help with aligning the perpendicular bolts on either side of the runners., What is the torque specification for an aluminum intake manifold with aluminum cylinder heads on a SBC 350 (ZZ4)? Most of the spec's I'm running across …, 435-3603. Chevrolet Big Block Mark IV block with Late Bowtie aluminum, Iron Dart, Pro-1, Pro Top Line, & World Products iron heads, 12pt, ARP Stainless. Head Bolt Kit., summitracing.comThis aluminum head from Trick Flow produced 496 lb-ft of torque at 4,000 rpm and 455 horses at 5,300 rpm. With its 195cc intake ports and 215-cfm flow numbers at 0.400-inch lift it ..., Don't sacrifice quality for a low price--get both with our Summit Racing™ 64cc aluminum cylinder heads for small Chevy. The lightweight heads are cast from A-356 aluminum alloy and have 200cc intake ports, 64cc combustion chambers, phosphorous bronze valve guides, and ductile iron valve seats for use with unleaded gas., A nearly complete or dressed engine, which includes the addition of an aluminum intake manifold, carburetor, distributor, aluminum water pump, harmonic balancer/damper, spark plugs, spark plug wires, fuel pump, and fuel line, weighs just over 550 lbs. (around 500 lbs. with aluminum cylinder heads)., #1 · May 26, 2004. I'm now going to install my manifold and then headers onto my (pro topline) aluminum heads. I'm using ARP bolts for the manifold, and ARP studs for the …, Apr 20, 2023 · Ultimately, the intake manifold bolt torque for LS engines is the same for all variations and code names, and it’s 44 in-lb for the first pass and 89 in-lb for the second and last pass. However, the tightening sequence, as we described, is equally as important. Also, to remove or install an intake manifold on supercharged LS engines, the LS9 ... , This is on a small block Chevrolet. I know Socket head cap screws will only fit in some places, because the Diameter of the cap screw head is too large and a 3/8 nut is larger ! 69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau ..., 54.23 N-m. Years: All. Note: Chevy Small Block - Red Loctite. GM 5.7L-350ci-V8-SM-BLOCK Engine Torque Specs. Over 6,000 Automotive Torque Specs. Search Car Torque Specifications by Engine or Model., 383 Stroker. -5cc flat top pistons. w/ 64CC heads (pro comp aluminum) estimated compression from Eagle (bottom end) is 10.7:1. I think (??) the recommended plugs for the aluminum heads are Champion RC12YC (Autolite 3924); however the current plugs are a hotter plug Champion RC14YC (Autolite 3926). These plugs are a gasketed, .750" reach plug., These specs are for stock-type bolts with light engine oil applied to the threads and the underside of the bolt head. Moly and other lubes offer reduced friction and increased bolt tension, which will affect the torque figure. If you use aftermarket performance bolts like ARP's, you should follow the recommended torque specifications., Mar 18, 2009 · Bottom line: Changing just the carb, intake, and cam nets a 21.5-lb-ft, 55hp gain over the ZZ4's baseline configuration. These are easy bolt-ons well within the capability of the average hot ... , Big Block Chevy Intake Bolt Torque Specifications. 25 Ft/Lbs – Aluminum Heads 35 Ft/Lbs – Iron Heads. The torque spec can be anywhere from 25-35 on Iron heads, but for aluminum I tend to go towards the lower side. IF you do have a spec from the manufacturer follow that. Make sure threads in the head are clean and in good shape. , I just saw a set of these ZZ4 heads on ebay, the aluminum 1.94/1.50 58cc L98 D-port style heads for sale. I have read all over that they are good heads, and with a roller cam .474/.510 and 208*/221* @ .050" they make 355 HP/410 TQ with 10:1 compression. The thing is that the ebay ad says: very clean. not much use., 5090 posts · Joined 2004. #9 · Feb 22, 2007. Below is a pic of various 7/16 ARP rockerstuds that I have used in aluminum heads: The first is standard ARP with a 3/4" total reach into the head. The second is my modified BBC rocker stud with .500 removed from the bottom and and the top was cut down to the standard heigth., 289, 302, 351W, Assembled Cylinder Head Style, Aluminum. Features hardened locks and retainers. Head is compatible with most roller camshafts. Includes high-temp exhaust seats and bronze guides. Made from lightweight, yet strong aluminum with a natural finish. Intake valve diameter measures 1.940" and the exhaust valve diameter measures 1.540"., the intake bolts. Install all 12 bolts and washers and torque to 10 lb-ft. Follow torque sequence shown below. Then, using the same torque sequence, tighten all 12 bolts to 18 lb-ft for aluminum heads. Repeat multiple times in sequence until all bolts reach proper torque. Note: You will find that the end bolts reach their final torque, between the head and the fastener to prevent galling. All aluminum cylinder heads should be torqued to 65ft/lbs. This should be done in the proper General Motors sequence in 10-ft/lb increments beginning at 40ft/lbs. Moly lube should be applied between fasteners, washers and areas around head bolt to prevent galling and improper torque values., Sold as a pair. Uses 3/4 in. reach gasket seat spark plug. Heads are drilled to accept both early style (12 bolt) and late style (8 bolt/Vortec) intake manifolds. Exhaust ports are 1/2 in. raised compared to stock cylinder heads. Welcome to a new class of high performance cylinder heads--BluePrint Muscle Series!, Cylinder Heads, Aluminum, Assembled, 64cc Chamber, 200cc Intake Runner, Chevy, Small Block, .525 in. Lift Max, for Flat Tappet Cam, Pair Part Number: SUM-162112 4.11 out of 5 stars ( 9 ), Big Block Chevy Head Bolt Torque Specifications. Long Head Bolts 75 - 80 Ft/Lbs. Short Head Bolts 65 - 68 Ft/Lbs. I would also add make sure you torque the bolts in steps. Do a first round hand tight, second round at. 50% torque (OK, let's just say 35 Ft/Lbs) then final round at specs., What is the torque specification for an aluminum intake manifold with aluminum cylinder heads on a SBC 350 (ZZ4)? Most of the spec's I'm running across are assuming cast iron heads, stating 25 ft. lbs. I've also run across spec's indicating 33 ft. lbs. for GM 3.7L (aka 350) but no distinction was made for cast iron or aluminum heads. The ..., Details. Edelbrock part #5001 Torker II intake manifold is designed for 1955-86 high-performance's street 262-400 c.i.d. small-block Chevys. This Torker manifold is a singe plane low rise intake that's great for high performance applications that have limited hood clearance. The manifold has an exhaust crossover for easy cold weather warm-ups ..., Subject: Image Created Date: 20080715072442-0400, Small Block Chevy Intake Manifold Bolt Torque Specifications. 25 Ft/Lbs. Make sure you follow the sequence in a couple of steps, worry about this more on old and aluminum manifolds. Cast Iron is much more forgiving if you are unfortunate to have to use a boat anchor of an intake., ProMaxx Performance 185cc Aluminum Cylinder Heads Small Block Chevy. 185cc Aluminum Cylinder Heads. Small Block Chevy. 2.02''/1.60'' Valves. 185cc Intake Runner. 72cc Combustion Chamber. Straight Plug. Assembled. Sold as pairs., 22557 posts · Joined 2007. #3 · Aug 1, 2015. Spec for the SBC is 65-70 ft.lbs with factory bolts.....75 ft.lbs isn't going to hurt anything....but if you want to re-torque, it is a good idea, you will find that the gasket has relaxed some under the compressive force of the head, and you will find some bolts seem looser, usually the longer ..., Small Block Ford Intake Bolt Torque Specifications. 18 Ft/Lbs - Aluminum Heads. 22-25 Ft/Lbs - Iron Heads. Do the torque in 2 steps, first just hand tight, second with the torque wrench. IF you do have a spec from the manufacturer follow that. Make sure threads in the head are clean and in good. shape., Requires hardened pushrods.; All E-Street Cylinder Heads are sold in pairs; Dyno tests showed a gain of 16 hp and 11 ft-lbs of torque over our overseas competitor; Intake Valve Diameter: 2.02 in : Intake Runner Volume: 185 cc : Material: Aluminum : Push Rod Diameter (Suggested) 0.3125 in : Rocker Stud Diameter: 0.375 in : Valve Angle: 23 deg ..., 413 posts · Joined 2001. #1 · May 26, 2004. I'm now going to install my manifold and then headers onto my (pro topline) aluminum heads. I'm using ARP bolts for the manifold, and ARP studs for the headers. ARP says 39ft lbs, but I once stripped out a thread (P.I.T.A.) at 30ft lbs, so im definately wary of doing that again.