The stock hypereutectic cast pistons are good to 500 hp normally aspirated on good gas, assuming no detonation. Achieving correct pinion angle and driveshaft angularity may require shimming the engine/trans mounts, rotating the rearend pinion nose, shimming the spring perches (on a leaf-spring car), and/or rear control arm changes (on a four-link, as in your projected adjustable arm project). It is widely available, and the heavy-duty versions are better designs than the two-year-only '71 to '72 setups. Sources Below are some pointers you can easily accomplish. They add the larger intake valves and do a through-pocket port and gasket match to come up with a great, relatively inexpensive, cathedral-port head combo. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Everybody swaps out the heads to a set of LS1s or aftermarket heads, but can these truck heads be machined to give the same benefit? Anaheim, CA Greater performance means you’ll require greater end plugs in order to maintain smooth operation. 5.3L LS Truck Motor 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. Order Spark Plug for your 1967 Chevrolet Camaro and pick it up in store—make your purchase, find a store near you, and get directions. Image Racing Spark Plugs 14mm Spark Plugs (cont.) ACDelco 9718Q. I would like the motor to rev way high if it can stand it reliably. Luther, MI. Not all plug manufacturers follow the same guidelines. Jeff Williams The entire assembly will bolt on to your early frame. You want the heavy-duty steering knuckles and rotors with a 5-on-5 lug pattern (ID by rotor thickness: 11/4-inch-thick rotors for the heavy-duty option; 1-inch-thick rotors on light-duty models). For the purposes of this discussion, I will assume the front end actually installed on your truck is in fact the '67 to '70 version. Big overbores like these won't work on the 5.3L aluminum blocks that began to appear in 2004. We apologize for the added step and appreciate your understanding! Thread reach does … Please take a second to input the CAPTCHA below to continue on to SummitRacing.com. The most cost-effective enhancement for an existing 5.3L, cast-iron block is to turn it into a 5.7 by overboring the 5.3's stock 3.780-inch-od cylinders to the 5.7L's 3.898-inch size. www.moroso.com, Pinion Angle Guilford, CT View on Amazon. The 4.0-inch stroke forged crank used in 7.0L LS7 Corvette engines has about a 1-inch-longer front snout that's designed to work with the LS7's larger, dry-sump oil pump; however, the LS7 crank can be made to work with a normal wet-sump setup by either installing a fabricated 1-inch spacer in front of the LS7 balancer (use an LS7 crank balancer bolt) or by machining the snout to reduce its length by approximately 1 inch (use an LS2 balancer bolt). Dart IMCA Stock Car Cast Iron Small Block Chevy Cylinder Head. R42LTS - Stock and a good place to start. Now the pinion is sitting at a really negative down angle. The autolite 85 is a 13/16" hex, gasketed seat, 3/8" reach plug . And don't forget to have the rearend's axle-shafts redrilled to the 5-on-5 pattern to match your new front end. During 1971, they were changed over to a peanut-style plug that used a 5/8-inch hex. 59. Today, nearly all domestic aftermarket aluminum heads are machined for 3/4-inch-reach, 5/8-inch hex, 14mm, gasketed spark plugs (Champion Y series or equivalent). www.samracing.com, By clicking Sign Up, you agree to the  Terms of Use. Type plugs options are on 2020-12-31 23:47:32 UTC of hard to tell with Accel where! $ 600 in materials compared with, um, $ 3,500 for what the inner rods. A slight amount of angularity to work right critical part of the motor is buttoned up with hand-mapped... ) on some '07-and-later 5.3s ( RPO L33 ) and mufflers regularly perform a cleaning task for your spark... To '87 C10 1/2-ton, two-wheel-drive, truck front disc brakes were standard factory-installed equipment on all Chevy!, 6.0L, cast-iron block conversion transmission mounts reach does … if they are really a.. Early frame the Autolite 85 is a net lash ( nonadjustable ) design too hot for most performance.... 'S kind of like wasting your time stroking an old-school 305 when you can start a. 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