Wheels for the back of an A Body barracuda....?

Yeah...I was somehow thinking a 64-66 since they have the smallest wheel openings but a 67-69 can take a 15x10 if you are willing to take the tire a bit beyond!

It's a 69 but I've left the rear stock, no leaf movement, all stock.
Was told 15 x 8 with 4.5 backspace will fit that's what I wanted to know.
Also the front are 15 x 4 with 1.75 backspace, please tell me that they will fit.
Thanks.
MAPS