1968 Corvette 427 big block 3916321,4 bolt mains, 427 6223 Crank, 427 Heads 3904391 Heads Date C13 7 and C15 7, they have had some porting done. The engine block is 60 over and has been drilled for 1/2 13 head bolts, the heads have been o ringed or fire ringed, The crank is done and is 20/20 and also has extra cut for blower hub, the plan was to run a blower? The heads have been checked and are good, All the valves, springs and guides are there, These heads alone are selling for more then every thing I have listed here, non dimple floating rods, These parts have been in storage for years. Please read add completely any comments are greatly appreciated?