Small Bolt Pattern Wheels Don't Fit Wilwood Disc Conversion

I may have a similar problem. the previous owner put on wildwood manual discs and brake rotors/calipers...he also changed to LBP. I want to run steel wheels (currently has aftermarket wheels that are not my style). I tested a set of 14's and the calipers are hitting the rim. I am going to the body shop to pick up my 15's I had on my 69 roadrunner and test fitting those before paint...backspace on the 15's is 4.25