My plan for new wheels, what do you think?

Veryfastdart said
245/60/15 for sure, Possibly a 255/60/15 with the proper offset.
That is it on a stock A body without mini tubbing and spring relocation.

255 60-15's on 15x7 with 4.25 backspace. No rubbing or trimming. Close though. I have a extra leaf so it sets higher than stock which helps.