I had a 1 1/8" MC with manual brakes and 73 up A-Body discs up front, drums out back, and it was a nightmare. I went to the 15/16" bore base on Dr. Diff's recommendation and it was a night and day difference. Part of that recommendation was based on me telling the good Doctor that I would be swapping to the Viper brakes (and hopefully his rear disk kit) down the road.

I now have the spindles and calipers. Next week I will order the ARE adapters and the rotors. Can't wait to see how the car stops when I'm all done.



I will try a 15/16" cyl before to order the hidro- boost system.

Would be nice to save those $$$ just changing the master Cyl.