GMPerformance Parts, Blocks, Cranks, Cyl Heads and more are just a click away.... GM Performance Crate Engines   350 5.7L 290 hp 350 5.7 L 240 hp 350 5.7 L 330 hp 350 5.7 L 330 hp complete 350 5.7 L ZZ4 355 hp   Fast Burn 385 6.0 L Fast Burn 345 hp 383 High Torque 383 ZZ 4 "425" hp   454 7.4L 440hp 502 502hp complete 502 "RamJet" ZZ572 620hp