Which 3" tailpipes?

Since there is no exhaust shop anywhere near me with a mandrel bender, I'd like to buy tailpipes for my 3" exhaust that need the minimum of rework to fit. I broke in the cam with turn-downs and it'd be way too loud, not to mention that MO doesn't allow underbody exit.

Car is a '72 Dart Swinger (111" wb), 451, Hedman B-body headers, X-pipe, Summit 3" turbo mufflers in (hopefully close to) stock position. I have minitubs with the springs relocated inward.

I made the headpipes from mandrel bends since I needed small dog-legs to line up the Hedmans with the crossmember humps, then the Summit X-pipe kit with the mufflers on the end of the rear legs. So now I need to get from the mufflers over the 8-3/4.

I was thinking of the TTi '67-'76 3" tailpipes which are $236 +shipping at Mancini, but don't know how well they'll fit my particular chassis and for that price I don't want to do (or pay for) a lot of reworking.

Any thoughts?
thanks
Charles