This engine started life as a 454 4 bolt main roller block, got a nice set of forged 10.5 to 1 pistons, Late model vortec heads, comp xe300hr-10 hydraulic roller cam with valvetrain to match. Edelbrock Victor intake, tall fabricated aluminum valve covers. Very mean lopey big block. Feel free to get ahold of me for more details. Other and custom builds available also.
John