Gastricks car looks just right with his setup and wheel backspacing.

56" outer brake drum to outer brake drum is pretty much the perfect size for 32's and A's.
57" to 58" is very workable and changing to wheels with a different backspace is easy.

My 32 roadster has a 56" rear axle and takes wheels from 10" x 15" down to 6" x 15".
The big wheels backspace at 3" and the other rear wheels I've run (7" x 15") had a 4" backspace.

The 4" backspace wheels didn't look right, but to be fair the tires were smaller than the 3" backspace wheels ran.