>I have a 283 that has been rebuilt and bored .020" over. I read a 283 bored030 >over with a 400 crank would make a 360. what other parts do I need to do >this?

Actually, the displacement would be 357.5 cubic inches. The 283 has 2.30" diameter mains and the 400 crank has 2.65" diameter mains, so the crank would have to be machined. Then you'd have to find custom pistons with the correct pin location to get the deck height correct. In short, this isn't an "off the shelf" build. None of this would be as cheap or as reliable as building a 350 and you'd end up with about the same displacement. Why bother?

Bob