New wheels and tires

You may be able to squeeze a 245/60/15 on the rear which is 26.6" tall. That would be decent. A 215/70/15 front is basically 27" tall and would most likely rub especially when turning not to mention look goofy being taller than the rears. I have 215/70/15's on my 70 Duster as rollers currently and they rub when turning sharply. A 205/65/15 would be a good tire at 25.5" tall to compliment a 245/60'rear. That's basically the combo I had on my 71 Scamp. Looked good.