Putting 325s out back?

Hope it's ok to post in this old thread?

I would also like to put 325-50/15's under my '72 Dart. It has already been mini-tubbed when I got it, and I'm planning on ladder bars (but not sure yet if coilovers or leaf springs/floaters)... The problem is that I have a B-body 8-3/4 rear & leafs hung under it currently (haven't measured it yet to see which one, there are different widths!) and don't want to narrow it.

Section width is about 13.1" (vs. 11.1" for a 275/60 tire). That will be tight. It will need lots of backspacing, probably 7 or 8". There doesn't seem to be any 10" rim with that much. The Centerline Auto Drag 15x9 is the minimum recommended width for the planned Nitto DR555 drag radial, but it can be had with 7-1/4" bs).

On the other boards I've been recommended to call Wheel Vintiques and go with a steel rim. I guess the bottom line is, 325's MAY be doable without custom rims IF the 7-1/4" backspacing is sufficient. Time to get out the measuring tape and plumb line...