ALL CRATE ENGINE

Part Number: 12498827

ALL  CRATE ENGINE - Part Number 12498827
Crate Engine ZZ572/720R Deluxe. Highlights: HP: 720 @6250 rpm TQ: 685 @4500 rpm Orange powder-coated Gen VI tall-deck Bowtie iron big-block with 4-bolt mains Forged steel crank and rods; forged aluminum pistons Aluminum rectangular-port cylinder heads 12:1 compression ratio High-lift (.714-inch) mechanical roller camshaft 6-quart oil pan with windage tray Single-plane aluminum intake manifold 1090-cfm Demon carburetor Orange powder-coated cast aluminum valve covers with 572 Chevrolet logo HEI ignition and 8-mm spark plug wires GMPP's first drag racing engine is also the most powerful we've ever offered. If you're looking fo a take-no-prisoners big-block for your Sportsman racecar, the 720-horsepower ZZ572/720R - the "R" stands for Race - its your answer. It simply is the most powerful big-block crate engine ever offered by GM Performance Parts and is our first factory-engineered drag racing engine. With the Gen VI tall-deck Bowtie block as its foundation, the engine builds on the popular ZZ572/620 crate engine, but adds reconfigured rectangular-port heads that combine with the forged pistons to squeeze out a 12:1 compression ratio - yes, racing gas is a must. A solid roller cam with .714-inch lift lets the ports take deep, deep breaths. Roller rocker arms and strong chromemoly retainers ensure accurate valvetrain performance at high rpm levels - up to the engine's 6750-rpm limit. The ZZ572R/720R is rated at 720 horsepower at 6250 rpm and produces 685 earth-moving pound-feet of torque at 4500 rpm. Of course, the engine is built with the best heavy-duty parts in GMPP's arsenal, including a 4340 forged steel crankshaft, shot-peened forged steel rods, forged aluminum pistons with full-floating wrist pins, stiff dual valve springs and a louvered oiling windage tray. Distinctive "572 Chevrolet" cast aluminum valve covers complete the package. GMPP suggests making your engine build-up easier by ordering the ZZ572/720R Deluxe. We integrated, durability-tested and validated this combination and determined it works best with the Deluxe version's 1090-cfm Demon four-barrel carburetor, tall-deck single-plane intake manifold, HEI distributor, aluminum short-style water pump and 8-mm spark plug wires. Just add our lightweight starter and it's ready to rock the competition. Installation Notes: Clutch linkage boss is cast into 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 (not included). Requires electric fuel pump because Gen VI tall-deck block has no mechanical pump boss. Comes with a 14-inch automatic transmission flexplate. Requires externally balance flywheel for manual transmission applications. Intended for 1979-and-earlier pre-emissions vehicles and all off-road vehicles. Not intended for marine applications. Big, sticky slicks will help hook up this monster. Note: Distributor with melonized steel gear must be used with long blocks and partial engines with steel camshafts, or engine damage can occur.
ZZ572/720R Deluxe

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