I'd like to get up and running with what I've got. I can't find a source for the headpipes with the flanges in the earlier magnum sizes. If I could find 'em, I would weld it up myself.

I've been to two shops and they don't like the idea of using larger headpipes. Sayin' something about burning up the cat, not enough room for the pipe size or to make the bends before the cat.

As far as the cat goes, guys run headers to the stock headpipe and cat all day long.

I was in hopes that someone on here had done this before and had some ideas. There is a lot of talk about the early manifolds being better, but I have found out that they don't bolt right in.