Using mustang rotors for 4.5" bc

I had my hubs made with the 4.5 Stud Spacing had my rotors redrilled use all the factory kh setup ,STD bearings ,dust caps cost $300.00 no head aches been on the car for four years and no issues. I want to find rotors which will work in the future where I won’t have to drill. I thought 73 rotors might work but was getting different measurements from different sites . I know they are a little wider on the pad surface area and are a few mm taller but would clear inside the caliper . Just not sure of the hat area if it’s wider or shorter than the 67-71 models as the pictures are all generic.