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  • ZZ 572 720R Big Block Crate Engine
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hp @ 6300 rpm

Our baddest, most powerful Big-Block engine is ready for the strip

A 10-second car is quick, but the ZZ572/720R could achieve that with a couple of its spark plugs left in the pits. It is the king of all Rat engines and is capable of pulling your bracket racer or heads-up challenger down the 1320 in the 9-second range.

The ZZ572/720R’s true value lies in its ready-to-run status when delivered. Rather than waiting weeks for a racing engine shop to build a custom combination, we deliver the ZZ572/720R fully assembled; just bolt on the included Dominator-style 1150-cfm carburetor, along with a starter and fuel pump (not included) and you’re ready to go.

The ZZ572/720R is built with the best stuff we can find, including an all-forged rotating assembly, rectangular-port aluminum cylinder heads with 113-cc intake ports, and 2.25/1.88-inch valves. There’s also a solid roller camshaft with 0.714/0.714-inch lift.

If you’re building the ultimate dual-purpose car, the ZZ572/720R is suitable for limited forays on the street. It has a 12.0:1 compression ratio, so make sure you’ve got access to 110-octane gasoline before hitting the local cruise night!


Click on the slider to see the torque and power ratings change with rpm.*

*Approximate values shown.


Part Number:
Engine Type:
Chevy Tall Deck Big-Block V-8
Displacement (cu. in.):
Bore x Stroke (in.):
4.560 x 4.375
Block (P/N 19212195):
Cast-iron with four-bolt main caps
Crankshaft (P/N 88961554):
Forged steel
Connecting Rods (P/N 19170198):
Forged steel, shot peened
Pistons (P/N 88963227):
Forged aluminum
Camshaft Type (P/N 24502611):
Mechanical roller
Camshaft Lift (in.):
.714 intake / .714 exhaust
Camshaft Duration (@.050 in.):
278° intake / 282° exhaust
Cylinder Heads (P/N 88961160):
Aluminum rectangular port, 118-cc chambers
Valve Size (in.):
2.250 intake / 1.880 exhaust stainless steel
Compression Ratio:
Rocker Arms (P/N 12361323):
Aluminum, roller style
Rocker Arm Ratio:
Distributor (P/N 10093387):
Electronic ignition
Carburetor (P/N 19170096):
1150-cfm Dominator
Water Pump (P/N 19168602):
Aluminum, short-style
Spark Plugs and Wires:
Recommended Fuel:
110-octane race gas
Ignition Timing:
Base 8° BTDC, 36° Total
Maximum Recommended rpm:


Already own one, but lost some of the paperwork? We’ve got you covered with downloads and links for some of the more important documents below. You’ll find everything from the vital data about your engine’s capabilities to how to install it into your build, even all of the warranty information should you need to make a claim. And don’t forget, the best way we can make sure to get you the latest information on your specific part is to tell us which one you have by registering your engine. No matter what stage of your build you’re in — from shopping for the right part to that part having turned in a few miles — we have the information you need.

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  • ZZ 572 Big Block Crate Engine Installation


    • Due to crate fitment, the carburetor is shipped in a separate box and needs to be installed by an engine installer
    • Clutch linkage boss is 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
    • Requires addition of starter, ignition coil, and fuel pump (not included)
    • Gen VI tall-deck block has machined mechanical fuel pump boss
    • Requires internally balanced flexplate or flywheel depending on transmission applications
    • Designed for pre-1976 street vehicles or any off-road vehicle
    • Not intended for marine applications
    • Big sticky slicks will help hook up this monster
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Download a catalog for a full listing of components and related parts.

SuperMatic 4L85-E Four-Speed
Transmission • P/N 19154550

Lightweight Starter • P/N 12606096

Fuel Pump, Street Performance (Chevy Big-Block)
• P/N 12355614

Transmission Controller • P/N 19212657

Serpentine Accessory Drive-Belt System With Air Conditioning • P/N 19172805

Chrome Water Neck • P/N 12342024

  • 1 Performance MSRP The Manufacturer's Suggested Retail Price excludes tax, shipping and installation.

Destination Freight Charges

To allow you to do an accurate price comparison with prices featured on other Internet sites, GM provides Internet pricing both with and without the Destination Freight Charge (see prices including Destination Freight Charge below). To get full pricing details, go to our Build Your Own section.