Exhaust sounds?

Well then I'll have to grind out the outlet on the manifold farther. (Doable I think)
2-1/4 is already 1/4" bigger than what was on there stock, I had figured that would be as good as it was gonna get w/o going to headers or dutra duals but I don't have an extra $600ish laying around right now to do either.

No, you don't want to that. The stock manifold can use a common 2 1/4" flange. Just use a common 2 1/4" to 2 1/2" adapter. Personally I would use 2 1/4" from the manifold thru the first bend and the make tapered cone to the second bend and 2 1/2" the rest of the way out.