I got the Front Disk Brake conversion..... So here is the deal if you are using stock 14" steel wheels that are 5.5" wide rim, I also kept the 5x4 bolt pattern which I had to have the RAM MAN make me a custom rotor. Also on the 64 it has the small upper control arms, so either you have to put the 10inch control arms in or, go to Dr. Diff or Ram Man and get hardened spacers for the upper A-arms to go into the knuckle.
This WILL NOT BOLT RIGHT ON!!!!! He sold me the 71-76 Dodge Dart Single piston. Told me it would work, does not work you need to shave off quite a bit of caliper and use spacers, now I forgot how wide the spacers are but they are the thinest ones out there. The car does stop great!!! I did also not use the rear brake residual pressure valve.
And I should have put disk brakes on a long time ago, BUT..... I SHOULD HAVE USED THE 65 KELSEY-HAYES SET UP!
I did not do enough homework and I hope this helps you. I am still some what happy with what I got, and I think a set of slotted Mags that are 7" wide should work fine, I have not tried yet. I will take this set up off my car in the winter and put on the K-H set up.
I have now amassed a lot of brake parts. the K-H Rotors are still available new. I have a complete brake set along with a spare brake booster if I never need it.
Please ask lots of questions. Bottom line if your using 14" rims you need to know the limitations.