OPINIONS ON EXHAUST SOUND

I used the 2.5" 17748s under my 69 Barracuda BUT I flanged the outputs so I could blt the tailpipes on and not make it so har don the bender at the shop to get the tailpipes just right. I think the 17747s are 2.25" but flanging them will make it easier too.
Tom I was about to order the 17748 but I just noticed that Dynomax website says the inlet is Centered and the outlet is Offcenter. My current mufflers are just the opposite, inlet Offcenter and outlet is Centered. I presumes that I may need a new tail pipes made because the mufflers cannot be flipped correct?