Chevy ZZ572/720R Base Engine

You'll notice the bright orange powder-coated 572 block. You'll feel the aluminum rectangular-port heads and 12:1 forged aluminum pistons. The ZZ572 - 720 horsepower model is the ultimate big block for all out performance on the street or strip. The ZZ572/720 base long block includes all the features of the Deluxe engine, without the the carburetor, intake manifold, water pump, distributor and spark plug wires. This engine option lets you of use parts like a carb that you may already have. If you have to buy a carb, the 1090 CFM Demon 4 barrel works perfectly on a tall deck intake. An HEI distributor and performance ignition system are a good combo.

NOTE: Intended for pre-1977 street vehicles and all off-road vehicles. Not intended for marine use.

Possible Applications

  • Build a solid 9-second race car
  • A street and race car
  • Earth shattering neighbor waker

*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.

Part Number: 12498826
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 88963227): Forged aluminum
Camshaft type (P/N 88962216): Mechanical roller
Camshaft lift (in): .714 intake / .714 exhaust
Camshaft duration (@.050 in): 266'c1 intake / 274'c1 exhaust
Cylinder heads (P/N 88961160): Aluminum rectangular port, 118 cc chambers
Valve size (in): 2.25 intake / 1.88 exhaust stainless steel
Compression ratio: 12:1
Rocker arms (P/N 12361323): Aluminum roller style
Rocker arm ratio: 1.7:1
Maximum rpm: 6750

zz572 - 720R Base engine image

Part #:12498826

zz572 720 R base dyno image

Installation Notes

  • Clutch linkage boss is cast and machined in block, but must be 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 additional parts (not included).
  • Gen VI tall-deck block has machined mechanical fuel pump boss
  • Requires internally balanced flywheel for manual transmission applications.
  • Intended for pre-1977 street vehicles and all off-road vehicles.
  • Not intended for marine applications.
  • Big, sticky slicks will help hook up this monster!