68 GT convertible project

burdar said

I've heard the 73+ setup increases the front track. I want to get the front as low as possible and I'm afraid I'll need all the clearance I can get. Besides, the KH's just look so cool. I was going to run the Mustang rotors to get the BBP.

Summit or Jegs lists a rear disc kit also.

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Very little. If you buy after market rims, you just pick the right backspacing.

With 73 disks on my 68 GT vert, I can run factory 15x7 rims (cop/rallye) that have 4.25 and a 225/60/15 tire. With the car low, I can barely fit 245/60/15 on 15x7 with 4.25 backspacing with small bolt pattern. With the thicker flanges of a LBP rear axle, you the drum face pushes out like 1/4", IIRC (maybe someone can confirm actual measurement).

I would suggest rolling the top of rear fender lip a little now before paint.

A rear disk has a thicker plate that mates to the flange, so you the rim will get pushed out a little more also.