Carburetor

850cfm four-barrel with mechanical secondaries and electric choke for ZZ572/620.

1090cfm four-barrel with mechanical secondaries and no choke for ZZ572/720R

Distributor

High Energy Ignition (HEI) for ZZ572/620. Competition multiple spark discharge unit with an adjustable collar for ZZ572/720R

Ignition Timing 15° initial advance, 36° total advance

Flex plate

Standard automatic transmission flex plate for ZZ572/620.

No flex plate included for ZZ572/720R

Horsepower Rating

620 HP @ 5500 RPM for ZZ572/620.

720 HP @ 6250 RPM for ZZ572/720R

Intake Manifold

Aluminum single plane for Holley 4150 series carburetors for ZZ572/620.

Aluminum single plane for Holley 4500 series carburetors for ZZ572/720R

Maximum Engine Speed

6000 RPM for ZZ572/620. 6750 RPM for ZZ572/720R

Torque Rating

650 ft.lbs. @ 4500 RPM for ZZ572/620.

685 ft.lbs. @ 4500 RPM for ZZ572/720R

Water Pump

Short legged aluminum pump