8 3/4 B to A swap

I have a 62 Dart with an 77 cop rear end in it with the steel wheel that are 5" off set.
My 275 60 r15 will work on them, but the American racing with 4.5 won't. I have a 65 with a 323 sure grip I'm going to have cut to make it fit. If anyone has the right rear end and want to do some trading I'm here.
Thanks