67 Dart- Can I fit 15x7 wheels both front/back?

Hello everyone- Got a question for you. I have a 67 Dart 2 Door Hardtop, Slant 6 225. I'm converting the manual front brakes to power disc with a 5x4.5 bolt circle and tubular upper control arms. I'm also swapping out the original 7" rear end for a 8 3/4"

Aside these modifications- I'm pretty positive I can fit a 15x7 Mopar cop wheel with 4.5 backspacing but wanted to check with some experts to see if my hunch is correct.

I've even read that one could fit a 15x8 wheel as long as the backspacing is 4.5 but just not sure.
I look forward to any feedback.