Arguably the best all-around 23-degree valve-angle, conventional port location, small-block Chevy cylinder head, Air Flow Research’s 195cc Race-Port aluminum casting comes CNC-ported on both intakes and exhausts. The result is a more consistent casting that doesn’t require hand-finishing. The exhaust ports
The arrows indicate where...
The arrows indicate where American Speed grinds the block to clear the rods and long-stroke crank. All eight cylinders generally require similar clearancing. Current Mr. Goodwrench “Mexican” blocks retain more material for grinding than production U.S.-cast blocks made in the last 20 years.
Manley Platinum Series 10:1...
Manley Platinum Series 10:1 forged pistons are retained on lightweight tool-steel pins by double 0.042-inch–thick Spirolocks. Bushed and drilled for pin oiling, ASE’s 4340-steel rods measure 6 inches center-to-center. Federal Mogul high-perf bearings are used on both main and rod journals.
This engine uses lower-priced...
This engine uses lower-priced (yet durable) Speed Pro 1¼16-1¼16-3¼16 “claimer-moly” rings (PN R8902-060). A groove-lock spacer (arrow) is also needed because the stroker crank and 6-inch rods yield a short piston compression height, forcing the oil-ring groove down into the pinhole area.
Generally rods 6 and 8 come...
Generally rods 6 and 8 come closest to hitting. The profiled ASE 6-inch rods and ARP
12-point 7¼16-inch capscrews provide more clearance than stock forgings with their nut-and-bolt rods. Despite being 0.300-inch longer than typical 5.7-inch– long GM small-block rods, the ASE rods are also lighter.
The heart of the package is...
The heart of the package is ASE’s carbon-nitrided, 4340 forged-steel, 3.875-inch–stroke crank. Thanks to enlarged counterweights and drilled crankpins, the custom forging accommodates long strokes with no need for externally weighted dampers and flywheels—
or expensive Mallory metal.