What size tire using 15x6 wheel?

I'm looking at putting the exact same wheels, 15', on the front of mine.

Doesn't a smaller backspace cause issues with the front/bottom of the fender?

Isn't a 3.375 offset going to force you to get a smaller tire, not as wide? Not sure about tall.

I'd like to verify the backspaces I listed the thread below, but the one with less backspace, shiny chrome, sticks out too far, at least in person.

14x6 Cragars, 4.125 backspace, currently with 215/70/R14. Crusty, rusty.

14x6 Cragars, a smaller backspace, 3.75, currently with 205/70/R14. I noticed these are easier on the manual steering.

**Edit** I measured the shiny chrome ones again, the backspace is 3.25.

How to calculate tire size?

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That car looks like the one I bought new in OKC in 1968 .