THIS If I live long enough to get mine together, I'd like to imitate AAR / TA. My old RR had GREAT side exit they were 2 1/2 that came parrallel under the rockers, then 45'd out and were angle cut to parallel the car sides. Had an H pipe and cross brace at rear, entire thing dropped out of the headers in seconds.
That would be difficult to do on an A unless you found some THIN mufflers, or duplicated the AAR /TA method, of mufflers with in/ out same end