ZZ572/620 Deluxe Crate Engine
650 lb.-ft. @ 4,500 rpm 620 hp @ 5,500 rpm
The ZZ572/620 is the ultimate expression of GM Performance Parts’ engineering capability.
We build the ZZ572 with huge 4.560-inch bores and add a forged 4.375-inch-stroke crankshaft. To make sure those cylinders are packed with every cubic centimeter’s worth of atmosphere, we use a camshaft with incredible 0.632/0.632-inch lift and 254°/264° duration specifications.
Aluminum rectangular-port heads with 310cc intake passages complement the airflow capability offered by the big-bore bottom end. They also feature 118cc raised exhaust ports and 118cc combustion chambers. The valves are big, too – measuring 2.250 inches on the intake side and 1.880 inches on the exhausts.
GM Performance Parts delivers the ZZ572/620 Deluxe with an 850-cfm carburetor, HEI distributor, aluminum water pump and distinctive orange powder-coated valve covers that proudly proclaim the 572 legend.
For the builder who wants the foundation of this Big-Block powerhouse, but wants to fi nish it with the induction system of his choice, we offer the ZZ572/620 Base engine P/N12498792. It comes with the bottom end fully assembled – including the forged crankshaft, rods and pistons – along with the unique 0.632-inch-lift roller camshaft.
ZZ572/620 Deluxe Crate Engine Installation Notes
Due to crate fitment, the carburetor is shipped in a separate box and needs to be installed by an engine installed
Clutch linkage boss is now drilled and tapped. When using cast-iron exhaust manifolds, lower head bolts may need to be replaced with bolts with shorter heads for clearance
Requires addition of starter and fuel pump (not included)
Gen VI tall-deck block has machines mechanical fuel pump boss
Comes with a 14" automatic transmission flexplate. Requires internally balanced flywheel for manual transmissions applications
Designed for pre-1976 street vehicles or any off road vehicle
Not intended for marine applications
You do have a strong transmission and rear axle, don't you?
