early 8 3/4 rears?

I have a 63 and 65 dart slant cars, and a 273 65 cuda ( all auto). all have the 7 1/4. I want to at least change the 65 cuda to an 8 3/4. I have access to 65 b body 8 3/4, I will just fun drive, no racing...never had muck luck with d urability of 7 1/4 not to mention parts problem. I know the early 8 3/4 are not desirable due to the c clip deal. I know I will have to move the perches. will it work with stock 14 in 5 1/2 rims? i'm thinking the 65 rear end is slightly narrower than the 66-70? ..... A body 8 3/4 are too high for me, havn't run into 8 1/4 for a while........