Wheel fitment

I recently upgraded my 69 dart to 73+ sliding caliper discs. I used SBP rotors to fit my current wheels which are 14" SBP. Only trouble is for some reason they hit the outside corner of the caliper when I try to put them on. Anyone else had this issue? Is the SBP wheel a different shape that the BBP that this brake setup was designed for? Did I mess something up?

Considering grinding the calipers