Exhaust is going on this spring, finally. 70’ Coronet, 440 using Doug’s long tube headers, I’m thinking 2 1/2” off the collectors,then x-pipe and on to the mufflers. Looks like b-body mufflers are center in offset out and reduce to 2 1/4”, I’m planning to use the chrome tips. How big a muffler body can I use, I see them from 14” up to 20” or so. Is bigger necessarily better? We’re planning long (weeks) road trips in the car so not interested in any “drone” at typical highway speeds but would like that nice muscle rumble at idle and slower driving. I realize sound is a very subjective thing but any of your experiences with your exhaust would be much appreciated.