Rear tire size on a 75 Dart

So on my swinger I had 235/60-15 on them and they fit very comfortably. Then I swapped in an 8 3/4 with BBP and the the tire just about rubbed on the driver side. Passenger side has about 1/4" more clearance. This is not really uncommon on these cars. Also when going to BBP it sets the flange out slightly further. Just some things to keep in mind.
I ended up rolling the flare on the quarter a little but it was still too close for comfort. Threw some 225's on it and called it done.