Slantsix64 said

I fit a 245 60 15x7 on my friends 64 valiant we had that on a 15x7 rim with 4 3/8 backspace. I fit a 255 60 15 on my 64 dart with that same size rim but had to roll the lip a bit.

Small bolt pattern 7.25 and small bolt 8 3/4 were the rears

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