The 215/70-15 is a pretty tall tire at 26.85, that fact combined with the 7 wheel that has about 1/2 less backspace than a stock 7 Rally II wheel is creating the interference. I would be looking at a 215/65-15 thats 26 tall to alleviate the rubbing issue.
In the rear you have the same problem, the wheels kick the tires outward by 1/2 creating interference. One size smaller 245/60-15s would likely stop the rubbing.
You dont want to space the wheels out, tucking them in by a half inch (impossible unless you can find different wheels) would be ideal.
Unfortunately the 4 backspace on your wheels is far from ideal, they need 4-1/2 or better yet 4-3/4 to have a chance of working with your current tire sizes. So many aftermarket 15x7 wheels are made like this, with 3.75 or 4 of backspacing which isnt enough to enable you to run any decent size tires.
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1964 Tempest Coupe LS3/4L70E/3.42
1964 Le Mans Convertible 421 HO/TH350/2.56
2002 WS6 Convertible LS1/4L60E/3.23
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