Wheel and tire advice for 1967 Dart

Hey FABO! Okay, I am trying to decide on tire size and wheel back space for my 1967 Dart GT (7 1/4 rear, front 10.95 discs and factory rear Drums, no leaf spring/fender mods).

I know this gets asked a lot, I’ve read a ton of posts and learned a lot. Based on that, I’m thinking 215/65R15 fronts and 255/60R15 rears would work. I saw a post saying this rears are the widest that’ll fit without mods. Can someone confirm these tire sizes are a good choice and what back space front and rear I would need? I’m probably going to order Wheel Vintiques Rallye wheels.

Someone posted this amazing Dart (that apparently belongs to @toolmanmike ) as an example of the rear tire size. I love the looks of it!

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Yep. 255/60-15's on 15x7 with a 4.25 backspace.