Re: New block
It is not hard to get to 304 cubes . . . or larger, it is a matter of how long of stroke are you going to run. An issue that comes into play is the length of the piston skirt and pin location (getting into the rings). I'd prefer to have a larger bore (with plenty of wall thickness). But - with a 3 3/8 bore and 4.250 stroke, you'd be at 304 cubes . . . and this new block will have more cylinder wall thickness (I hope).
When you bore a standard Ford block to 3 3/8s, you end up with a cylinder wall thickness of approximately .100 or so (depending on core shift, rust, etc). I would really prefer a thickness at a 3.375 bore that is closer to .200 . . . and maybe a 3.500" bore that is close to .150 (I know, the math says it would be .1375 or so). I'll take all I can get!
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