Here’s what 215/70-15's look like on 15x5 TTO rims:
And here’s what the same tires looked like previously on early Dragmaster 15x6" rims:
If I had it to do over again, I’d run the 15x7 TTO’s (like what is on the back) all the way around with the 215/70 tires on the front. The extra width of the rim is almost all to the back (more backspacing), so the wheels wouldn’t stick out further, but the tires would look more stretched out over the rim (which I prefer). I can’t check right now but I think my rear tires (on the mags) are 255/60-15.