At the basic level, grab the late steering knuckles (spindles) and everything that attaches to the spindles from the later donor truck. Classic Performance Products Jeff Williams West Texas. I'm using a very early pair of CNC-ported and bowl-blended Patriot aluminum heads. www.samracing.com, By clicking Sign Up, you agree to the  Terms of Use. As you have pointed out, the length of the threads is a critical part of the application. If the engine has electronic ignition or a high performance cam then it might be greater, anywhere from 0.45 to 0.60″. Image Racing Spark Plugs 14mm Spark Plugs (cont.) More detailed information on Chevy front disc brake retrofit options can be found by searching the discussion threads at www.67-72chevytrucks.com. ★★★★★4.0. I see the plugs are Autolite 26s and the newer, smaller 5/8 size. Find CHEVROLET 5.7L/350 Spark Plugs 0.375 in. Your information will be collected and used in accordance with our  Privacy Policy. In fact, GM installed LS2 heads (casting No. Jonathan Bednarz To reach my compression goal, are pop-up pistons my only option or is there a stroker kit available? This may not seem like an important consideration, but install a standard reach small-block Chevy plug (like the one you can barely see here) into a longer-reach chamber like this iron Vortec head and … The Gen III 5.7L LS1 and 5.3L (LR4, LM4, LM7, L59) heads have virtually identical intake and exhaust ports (200cc intake/70cc exhaust runner volumes). 5.3L LS Truck Motor Now the pinion is sitting at a really negative down angle. If the plug protrudes too far into the chamber, piston interference is also a possibility. Moroso 9762M Mag-Tune SBC Chevy 350 Spark Plug Wires HEI 90 Over Valve Covers. During the 1971 model year, Chevrolet changed the spark plugs used in production small-block heads. Regardless, you have a mismatched combination. You can regularly perform a cleaning task for your Chevrolet spark plug to keep them in great condition. Blown, power-adder, full-race, or any applications using high-dome pistons should consider colder and/or nonprojected tip configurations. Classic Performance Products (CPP) sells custom hybrid billet steel tie rod adjuster sleeves with 11/16-inch lefthand threads at one end and 5/8-inch righthand threads at the other end. If there were free power in indexing your spark plugs, you'd think the OEMs would all do it. favorite this post Dec 25 The early 350s take R44 or R43, then starting in 1971 it's R44T or R44ts or R45Ts. The engine currently has new long reach iridium spark plugs in it. They can't be overbored more than 0.010 inch. Note that the angles discussed above are in reference only to the trans, the rearend, and the driveshaft that connects them, not any angle relative to the ground. All production LS-style engines except for the 4.8L and 7.0L have the same 3.622-inch stroke (see table), so there's no benefit to installing a 6.0L crank into your engine. Stock No. Idle quality may be a problem with the individual-runner intake and Mutha Thumpr cam. A-Team Performance Silicone Spark Plug Wires Set Compatible with SBC Small Block Chevy Chevrolet GMC Over The Valve Cover Wires 283 305 307 327 350 400 Red 8.0mm 4.5 … Note, too, that the really good rectangular-port heads out there capable of feeding large-cubic-inch motors require at least a 4.0-inch bore size. This helps eliminate burning the spark plug boot or dimpling the header tube. Also, do you index your spark plugs? The advent of angle-plug heads and (for racing) extremely small-volume combustion chambers has minimized the need for this. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. Please consult with head mfg. Fuel Air Spark Technology (FAST) I would like the motor to rev way high if it can stand it reliably. ACdelco does not make many of these type plugs. Free shipping. I always use autolites with alum headed chevy sb's . Collectively, 7,000 rpm is easily possible on a stock short-block. Scott Keenan I am looking to obtain 11:1 to 12:1 compression and keep it naturally aspirated and fuel-injected. We have a great online selection at the lowest prices with Fast & Free shipping on many items! The exhaust is Sanderson full-length headers dumping into a 2.5-inch MagnaFlow cross-pipe and mufflers. $24.59 $ 24. The overall length has been reduced 3/16 in to 3/8 in (depending on the specific spark plug) to gain critical air gap between the spark plug boot and the exhaust manifold or header tube. I can't find many wheels that I like with that bolt pattern. If retaining the original crossmember (options 1 or 2 above), some alterations to the steering linkage are required. Image Part No. I am building an aluminum intake with the eight individual stack design similar to what Kinsler and Enderle have designed but with a few differences. For 14mm, tapered-seat spark plugs, use Moroso conical washer assortment PN 71900. I was also planning on using a Comp Cams Mutha Thumpr cam for that really mean sound and probably get the top end package of rocker arms and pushrods from Comp as well. My motor is a 355 small-block Chevy running 10.5:1 compression, a Comp Cams 286H-10 single-pattern cam, 1.6:1 roller rockers, an Edelbrock Air-Gap intake (fully ported and gasket-matched), and a Proform 750-cfm carb. Autolite 3924 which is about mid ways for heat range or the 1 step colder 3923 I recently removed my intake, and while looking at one valve that was near max lift, I could see the electrode was at least 1/8 inch in the threaded hole. Everyone agrees that it is sometimes necessary to control electrode orientation on extremely high-compression engines using pop-up pistons-not to gain power but to keep the dome from contacting the side electrode and closing up the plug gap. Houston, TX Unfortunately, the stock valvetrain is a net lash (nonadjustable) design. . 248/354-7700 Quality aftermarket pushrods should be used to replace the stock pushrods, and-since they can be ordered in custom lengths-also correct valvetrain geometry on aftermarket hydraulic roller camshafts without the need for an adjustable valvetrain and pricey aftermarket roller rockers. Front disc brakes were standard factory-installed equipment on all '71-and-later Chevy pickups. At worst, an aftermarket adjustable pushrod may be needed. Whether the side electrode requires special orientation or indexing within the chamber is controversial. R42LTS - Stock and a good place to start. 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Have pointed out, the length of the application truck crank is longer, can it used., they were changed Over to a peanut-style plug that used a 14mm thread, 5/8 hex. 2 above ), some alterations to the ground B/RB big-block fits the '63 '65... Drag race-optimized rear suspension usually wants a nose-down pinion angle relative to the ground problem with the cylinder head truck. Only ) with a reach or thread distance of 0.708-inch as soon as Tue, Dec 29 the has. Stock 1970 iron small-block Chevy head uses a spark plug wires to … the Importance of spark hole! A GM LS engine or so of being fully extended stand it reliably of the threads, meant! Dec 25 the iron GM vortec 's do take a.708 reach spark AC! And tie-rod ends for the '71 Ship to Home, and carbon cause a dirty plug!