Tony,
Ask Maurice if he'll step the headers for you. You will also have to give him the type head you're using before he makes the headers. Some have raised exhaust ports and that will make a difference on how they're built. Speaking of stroking, I'd have to give it some thought if I were to do it again. There is nothing like the sound of a small block, short stroke engine bringing up the revs. In comparison, my stroker sounds like a John Deere pulling a sod buster (or was that a big block falling all over itself). So many choices, so little time.
h dog