This 1972 Z28 now has a 572 big block from GM Performance.

The new ZZ572/620 is built around an all-new Gen VI tall deck Bow Tie big block.
This all new engine is filled with a forged 4340 steel crank with 4.375 inch stroke, shot peened,
forged 4340 H-beam rods, and forged aluminum pistons with full floating wrist pins.The redesigned rectangular
port aluminum cylinder heads result in a pump gas friendly 9.6 to 1 compression ratio. A hydraulic roller cam
with 0.632 inch lift actuates the stainless steel valves. And, of course, hardened chromemoly retainers,
roller rocker arms, and dual valve springs are used to complete the valvetrain.

This engine makes 620 horsepower at 5500 RPM and 650 ft. lbs. of torque at 4500 RPM.

BACK