A Body Tire Clearance

I can only confirm what I've dealt with, but OK. FWIW, my '74 Duster had its factory 8.25, all the rest except 1 Slant -6 '73 Dart had 8.75s.
In every case, the springs (whether with small relocation kit or stock), the wheelhouse size, and the opening were limiting factors, especially with the Dart body.
Maybe I just "got lucky" with the several A-bodies I've owned...