The engine is a .040 over 327 based off a 1991 4-bolt 350 roller block. The bottom end is balanced, and it has a GMPP LT4 Hot Cam. The heads are 63cc swirl port heads with LT1 springs, modded and port matched to the TPI, itself off a 1985 Corvette. The injectors are 28 lb/hr, fed by an MSD 2225 electric pump. Spark comes from a Mallory Hyfire 6A, and external coil, and a gutted HEI that only has the pick up coil. It also has full A/C and emissions delete (it's exempt by age).