Chevrolet Performance ZZ572/620 Base Crate Engine-19331581


  • 621 hp @ 5,400 rpm/645 il.-ft. @ 4,200 rpm
  • Cast-iron block with 4-bolt main caps
  • Aluminum oval port heads with 110cc chambers
  • The ultimate expression of Chevy Performance’s engineering capability

Available on backorder

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ZZ752/620 Base Crate Engine

P/N 19331581

ZZ752/620 Base Technical Specs:

Part Number: 19331581
Engine Type: Chevy Big-Block V-8
Displacement (cu in): 502
Bore x Stroke (in): 4.470 x 4.000
Block (P/N 19170540): Cast-iron with 4-bolt main caps
Crankshaft (P/N 10183723): Forged steel
Connecting Rods (P/N 19170198): Forged steel, shot peened
Pistons (P/N 12533507): Forged aluminum
Camshaft Type (P/N 12366543): Hydraulic roller
Camshaft Lift (in): .527 intake / .544 exhaust
Camshaft Duration (@.050 in): 224° intake / 234° exhaust
Cylinder Heads (P/N 12363390): Aluminum oval port; 110cc chambers
Valve Size (in): 2.250 intake / 1.880 exhaust; stainless steel
Compression Ratio: 9.6:1
Rocker Arms (P/N 12675724): Stamped steel
Rocker Arm Ratio: 1.7:1
Distributor (P/N 1104060): HEI type
Throttle Body (P/N 17113524): Included
Water Pump (P/N 19168602): Aluminum, short-style
Flexplate (P/N 10185034): 14″
Recommended Fuel: Premium pump
Ignition Timing: 35° Total at 4,000 rpm
Maximum Recommended rpm: 5,800
Balanced: External

Installation Notes:

– Requires a 12-volt power source (and ground), coolant, exhaust system, fuel feed and fuel return line (to the fuel tank). An in-tank fuel pump is recommended
– Clutch linkage bosses are now drilled and tapped. When using cast-iron exhaust manifolds, lower head bolts may need to be replaced with bolts with shorter heads, for clearance
– Designed for pre-1976 street vehicles or any off-road vehicle
– Not intended for marine applications

IMPORTANT! For a safe, proper and trouble-free engine break-in, the MEFI 4 computer has a “green” mode that controls rpm during the break-in period. During this period, engine speed is limited to 4,000 rpm in the first hour, 4,500 rpm in the second hour and 5,500 rpm in the third hour

Supersedes old GM P/N 12498792




ZZ572/620 Base Crate Engine

19331581 Chevrolet Engine

621 hp @ 5,400 rpm / 645 il.-ft. @ 4,200 rpm

Our Baddest Big-Block Street Engine

Proving the adage there’s no replacement for displacement, the ZZ572/620 is the ultimate expression of Chevrolet Performance’s engineering capability, wrapped up in a soul-stirring combination of performance and attitude. We build the ZZ572/620 with huge 4.560-inch bores and a 4.375-inch stroke to help it deliver 621 hp and a stunning 645 lb.-ft. of grunt!

Strength comes from a latestgeneration tall-deck block casting with four-bolt main caps and an all-forged rotating assembly, while high-flow aluminum rectangular-port cylinder heads with massive 310cc intake passages, 118cc raised exhaust ports and 118cc combustion chambers process tremendous airflow. A hydraulic roller camshaft with incredible 0.632/0.632-inch lift and 254/264-degree duration specifications optimizes the airflow volume enabled by the large-port heads.

Prop65WARNING: These auto parts can expose you to chemicals including phthalates and lead. Installing or using these parts can expose you to other parts containing these chemicals and to engine exhaust, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to