For those who basically want a fresh motor, but want to use their existing intake system, ignition, etc., World Products offers “partial” engines. You’ll get an all-new 4-bolt block, 4340 forged steel crank and connecting rods, forged aluminum pistons, new cylinder heads with Manley stainless steel valves, and a host of other top grade components. The rotating assemblies are electronically balanced and the long block assembled in World’s race shop environment.

Compression Ratios
528 Stage 2: 9.7:1
540 Stage 2: 10.3:1
572 Stage 2: 10.5:1