8.75 and 8.25 ready to go in (almost)

I already converted the front to BBP disks out with '73 spindles and am looking for BBP in the rear anyway so that would be ideal for me. I am also running steel wheels off a 2006ish Dodge Charger because I THINK that they will work with either an original A-body rear or certain B-body rear's but I wasnt sure how the F-body would compare. Running a 245ish tire is my ultimate goal but it wont kill me to run a skinnier tire if I need to. I just want to avoid having to cut and narrow anything
I believe that the F-body rear is narrower than most B-bodies, but someone else on here can probably correct me on that. I would guess that late model wheels would work well, I'm running something about 4.5" backspace, on a 7" wheel, and I've got at least another inch between the tire and spring perch on the inside, so I could probably run 5" backspace.