Chevy Crate Engine

ZZ572/720R Deluxe - A Complete Monster

Here is what the GM engineers were thinking when they built the ZZ572/720R: Think Space Shuttle power and grizzly bear ferocity. Hence the 720 horsepower and 685 lb.-ft. of torque—Chevy crate engine 572/720, the most powerful big-block Chevy crate engine ever offered by GM Performance Parts.

The 572/720 is built on the solid ZZ572/620 pump gas street engine platform with some major mods: They added 12:1 compression pistons, hotter camshaft, and their rectangular-port aluminum Bowtie heads with stiffer valve springs to work with the new camshaft. The solid roller camshaft is a .714" lift monster that feeds the air/fuel mixture into the stroker big-block.

The ZZ572/720R is rated at 720 horsepower at 6250 rpm and 685 lb.-ft. of bear like torque at 4500 rpm. The short block is built with a 4340 forged steel crankshaft, shot-peened forged steel rods, forged aluminum pistons with full-floating wrist pins, stiff dual valve springs, and a louvered oiling windage tray. The Deluxe ZZ572/720R ships with a 1090-cfm Demon four-barrel carburetor, tall-deck single-plane intake manifold, HEI distributor, aluminum short-style water pump and 8 mm spark plug wires. Special 572 cast aluminum valve covers complete the Chevy crate engine package. All you need is a starter to fire it up!

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