Well, one thing I can tell you is a 235 isn't going to fit with a 4.5 backspace because it hits the springs.
You might get away with 235's with a 3 3/4 or 4 inch backspace.
My rims are 4.5 and the biggest tire I can get on it without hitting the springs is about 225.
My 73 is a daily driver so during the week I do body and primer, then if the weather allows I can get more paint on it little at a time on weekends.
Since the top surfaces were the worst I started on those surfaces and working my way down panel at a time.
View attachment 1714989262
View attachment 1714989264