[Vortecpro]

One of the factory stock racers gave me a chance to build a L72 427 which I appreciate. Growing up around GM performance cars as kid in SoCal, then having a 68 Z28 with a L72 in high school left me very excited about this engine build. The build consisted of a 289 casting block with all the machine work, turning a tuftrided indexed 366 crank, custom JE pistons, modified oiling system, Bullet L72/LS6 cam, unported 840 heads, custom valves from Ferrea, factory GM rectangle port intake. Power in factory stock trim with a conservative tune was 535 HP @ 6300 RPM and 523 HP @ 6700 through the factory cast exhaust manifolds with the factory correct carb.