ZZ572-620 Base Engine

Chevy Performance ZZ572/620Get the ZZ572 in a more basic format. You can customize the water pump, induction system and ignition with your own parts. The ZZ572/620 long block Includes all the features of the ZZ572/620 Deluxe except the water pump, carburetor, intake manifold, distributor and spark plug wires.

The secret to theĀ  ZZ572/620 are the rectangular port aluminum cylinder heads that deliver 9.6:1 compression ratios in a pump-gas friendly package. Bumping the stainless steel valves is a hydraulic roller cam with 0.632″ lift. Chromemoly retainers, roller rocker arms and dual valve springs help make the valvetrain one tough customer.

Chevy Performance Crate EnginesNOTE: Intended for pre-1977 street vehicles and all off-road vehicles. Not intended for marine use.

Pace Performance LogoPossible Applications

  • A hot rod rocket
  • Weekend drag racing
  • Big Bad Chevy Performance Power

*Applications have not been validated. They are merely suggestions of how you might enjoy your GM Performance Parts crate engine. Some applications may affect engine warranty. See specific warranty information. Some applications may not be emission legal; check state and local ordinances.

ZZ572/620 TECH SPECS:
Part Number: 12498792
Engine type: Chevy big-block V-8
Displacement (cu in): 572
Bore x stroke (in): 4.560 x 4.375
Block (P/N 25534368): Cast iron with 4-bolt main caps
Crankshaft (P/N 88961554): Forged steel
Connecting rods (P/N 88962926): Forged steel, shot peened
Pistons (P/N 88962925): Forged aluminum
Camshaft type (P/N 88961557): Hydraulic roller
Camshaft lift (in): .632 intake / .632 exhaust
Camshaft duration (@.050 in): 254 deg intake / 264 deg exhaust
Cylinder heads (P/N 12499255): Aluminum rectangular port, 118 cc chambers
Valve size (in): 2.25 intake / 1.88 exhaust; stainless steel
Compression ratio: 9.6:1
Rocker arms (P/N 12361323): Aluminum roller style
Rocker arm ratio: 1.7:1
Distributor (P/N 88961867): HEI
Carburetor (P/N 88961560): 850 cfm
Water pump (P/N 14058915): Aluminum, short-style
Spark plugs & wires: Included
Flexplate (P/N 12561217): 14″
Recommended fuel: 92 octane
Ignition timing: 36’c1 total @ 5000 rpm
Maximum rpm: 6000