LS7- 454 Mark IV, High Performance (1970) Corvette Engine block and heads, Purchased brand new from General Motors factory warehouse. The engine is still in the original crate and comes with Hi Performance open chamber heads (Large Port), 4 Bolt Mains, The service manual with technical specifications and complete parts lists with General Motors part numbers is included. The catalog for matching Chevy V8 engine casting numbers with Chevy cars is also included. Will include Engine Stand. Serious Offers Over $2500.oo will be Considered. Pick-up Only. Note: This is a New Bare Block and Heads package. Cam Bearings, Main Bearings with Caps and Bolts installed, Frost plugs are installed.