DESCRIPTION: 427 ANNIVERSARY ALUMINUM ENGINE
The legend of the all-aluminum big-block continues.
The year was 1969, and the musclecar wars were in full swing. Each one of the big three had developed their own version
of the ultimate high performance big-block engine. Then, GM unleashed the ZL1, the most powerful engine ever released by
General Motors. Based on an exotic aluminum block, the ZL1 offered only the best components from the L88 engine including
a high compression piston, high flow aluminum heads and intake, and a bombproof bottom end. To celebrate the 50th anniversary
of the Chevrolet big-block, GM Performance Parts has brought back a modern version of the ZL1 for your chance to relive
musclecar history.
The Anniversary Edition 427 starts with the ZL1 aluminum block using the tooling that helped create this legend in 1969. The block
offers a full-strength structure, thick deck surfaces and 4-bolt mains. Building on that foundation, the short block contains a forged
steel crank, forged steel rods, and forged aluminum pistons for a 10.1:1 final compression ratio. Aluminum oval-port heads and
matching high-flow aluminum oval-port intake are paired with an 870-cfm carburetor. The camshaft is a hydraulic roller with valve lift
numbers of .510" on the intake and .540" on the exhaust. We even added 1.7:1 aluminum roller rockers. Like the original ZL1, the
Anniversary 427 comes grossly underrated at 430 horsepower.
Once you purchase an Anniversary 427 big-block crate engine, you enter a very exclusive club because only 427 of these
engines will ever be produced. A special owner's kit includes official Anniversary 427 emblems to place on your car, as well
as an engine data plaque and certificate of authenticity that share a matching serial number with the valve covers.
Only 427 of these crate engines will ever be produced, and then the ZL1 tooling will be retired forever.
This engine includes free shipping to your local FedEx freight hub for pickup. If you wish to have the order shipped to your billing address, please also order part number AD200, for the additional delivery fee.
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