[cdat]

Appreciate all the help and advice, after going down and talking to them the service mgr told me the guy I talked too was mistaken, that it's no different whether it was welded on or clamped. He said he used to prefer the welded on ones, said it was easier then dealing with rusted bolts and nuts. Ended up dropping the price by $100, so alls well that ends well.
Jon, I had also called Boise muffler this am to get some initial info, I had planned on taking the coach to them if the Cat dealer tried to tell me how hard it was going to be.
Thanks again.