It's a block, crank, and rods from a 1990 IROC, a set of Speed Pro forged flat tops, (I bought the short block disassembled for $200) and now an LT1 camshaft, Vortec heads, Speedway generic 1.5 roller rockers, and a GMPP TBI intake. Previously it had ported TBI heads and an LT4 Hot Cam with stocker rockers and intake. It also has some crappy cheap headers and 2.5" dual exhaust.
Martin
Martin