[olddog]

If you start with an aftermarket block at 4.125 bore and only go 4.0 on the stroke, I think you should be fine. Same stroke as a 408 with a 4" overbore.

The dirt track boys are running 430 inch SB chevy's with a shorter deck than a Windsor. They are running them hard and turning them up 7K and more.

A local fellow holds his own with a 347 ford. He likes the lighter engine.