8 3/4

Going to do this to the 73 Duster. I have a 8 3/4 out of a 68-70 B Body It is not much wider than the 8 1/4 in it now. As it sits it has 8 1/2 by 15s with a 3 1/2 back space and 275 60s. Its tight with a little rubbing. I think after relocating the perches a 15 by 8 with a 4in BS will work. I will be looking for some slotted mags in the future. Also the 8 1/4 will be for sale 3.21s with a SG.