Chevy ZZ572/620 Deluxe - Big performance with huge torque

Chevy orange on this monster lets you know it's got serious Rat power! The 572/620 hp deluxe brings 650 lb.-ft. of torque for a thrill ride you won't forget. Based on a 4 bolt main block with a 4.560" bore, the rest of the internals are forged for reliable power. GMP added a single plane manifold that is port matched to the rectangular port aluminum heads. A roller cam handles the valve movement with .632 inches of lift. This cam provides an aggressive idle that begs to be revved! This engine comes with an oil pan (with windage tray) to carburetor, including an 850-cfm Demon four-barrel, HEI distributor, red spark plug wires, aluminum short-style water pump, and automatic transmission flexplate.

Possible Applications

  • One Bad Hot Rod
  • Wake up the neighbors
  • Pure Mean

*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: 12498793
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'c1 intake / 264'c1 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

ZZ572 - 620 Deluxe Engine Image

Part #:12498793

zz572 - 620 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 addition of starter and fuel pump (not included).
  • Gen VI tall-deck block has machined mechanical fuel pump boss
  • Comes with a 14" automatic transmission flexplate. Requires internally balanced flywheel for manual transmission applications.
  • Intended for pre-1977 street vehicles or all off-road vehicles.
  • Not intended for marine applications.
  • You do have a strong transmission and rear axle, don’t you?