First of all,you have your tire numbers askew.
BFG...215/60/15. 8.7" wide 25.2 tall
BFG...215/70/15. 8.6" wide 26.8 tall
On the 215/70 the 6.5" is rim width,not tread width.
You think you have problems now,try putting on a 26.8" tall tire.Not going to happen.
The 215/60/15 you have,should fit like a glove.
I run 215/70/14 tires on a 65 and 70 Dart. On the early A I had to slightly trim the bottom of the front fender. Easy,Peazy.
215/70/14...8.7" wide 25.9 tall
As you can see the two tires are almost identical.
You have the right tires,just a little adjusting is necessary.
Do you have pics of the tires on the car,and where it is hitting ?