W;

It may I don't know, as I've only used them on the 292 engine.

I would think the Muffler Shop could "give her a bend or two".

Unless your building a "really hot" 250 engine, just use the stock one, as the only difference in at 'high' RPM. The "really hot" ones use headers to get even more etc.

Good luck. \:\)

John M., I.I. #3370

"There are no shortcuts to any place worth going". -Anon