c-4 to an FE block

[Ole Don]

Actually, after an expensive rebuild, a C4 can handle really a lot of horse power. That plus they use much less HP to turn, so it would be far more efficient. That being said, with all the C 6's out there, it would cost really a barn load of money to make a C4 conversion happen. C 6's came with several bolt patterns on the bell end, be sure you pick the correct one