Using mustang rotors for 4.5" bc

archlab said
I upgraded to the 1973-up Front Discs w/ the single calipers. You can mount them on the rear, get the Sway Bar space in front, simplify the caliper setup (1 caliper vs 4), & get all the lower priced rotors, calipers & evrything else you want without having to contort yourself. Also, you can upgrade to even bigger, mongo/ cop-brakes w/ this swap. I'm not sure that you can do this w/ the K-H...at least not economically.

The initial swap-out is a bit of a pain, but once it's in, you're set for the life of the car.

Once I put these in, I never looked back, nor did I ever consider having to rebuild & look for overpriced K-H parts. i think the calipers (rebuilt-NAPA) were about $13 ea, the rotors were $55 ea. I don't remember the cost of everything else, but in all, I think I got this done for around $200-$250 for the entire front end - that also included suspension parts & bushings. It's the way that I recommend.

It`s subjective whether going to the 2 piston (73 and up) brakes are actually an upgrade from the four piston KH brakes. Most people, (myself included) will argue that the KH 4 piston caliper is the better system. With that being said, the majority of people looking for the large bolt pattern are doing the same swap you have and are very pleased with the system. The availabilty/cost of parts that make up the post `72 system are an advantage over the KH system. This thread was to show that there is an alternative to using the later model 4.5" assembly without changing out everything. One other advantage to using the modified Ford rotor is that if there ever comes a time when you want to go back to the stock 4" bolt circle wheel, all you have to do is remove the hub/rotor and install the original.