How much clearance work is needed on the 351W block to get everything to fit? Were? In the cylinder skirts, panrails, oil pump area? I'm also concerned about compression ratio. I'd like to stay in the 9-9.5 to 1 ratio so that I can run "cheap" gas. Most of the aluminum heads have 60-62cc chambers, so that means either a greatly dished piston or large deck clearance, or both to get that kind of compression ratio. Or is it possible to get away with a higher ratio? What octane rating are you guys running in your strokers? I already have a toy with a high compression motor, now I want one I can drive daily and not break the bank paying for fuel.