Disc brake problem need help!

hey all
I did a disc brake swap bought the whole kit installed it on the car but had no idea that it wouldn't work with 14" SBP steel wheels it is the 73 up disc set up. I did the same swap on my 67 Barracuda but used 15" wheels. I started reading through the posts today after i figured out that the rims would rub. My question is can i use any of this set up if i buy a Kelsey Hayes set up? What is going to be the best fix besides going to BBP wheels and 15" The steel wheel I'm using is a 14"by 5.5" wide it rubs against the caliper. What I've read is the Kelsey Hayes set up is the only thing that will work with my wheels so what all will i have to buy to make that work?? I'm lost
Thanks
Pat Faley
67 NB
69 convertible project