Thanks, Joe Soltis!

I received the "shaved" rotors and installed one on the right rear.
Results: equal spacing on both sides now! I can get my finger(baby) between the tire and fender.
Running 5.5" Pedrinis with 185/15 rubber on a '70 IRS pan.
Thanks again, Joe.

Great news! I'm glad they worked out for you.
Joe

I am building right now, and at the foundation I have four discs on a '75 IRS tail. With 5.5 (911 wheels) and a 185 70 15 my clearance is also close, but not touching. I would love to hear the detais of the "shaved" rotors just get some clearance in the rear tire well. Would you share the info about yours?
John W

Each rotor bolting face was ultrasonically scanned for wall thickness and possible inclusion in the metal. At that time I also had access to metallurgical equipment to record the material composition. With this info I figured out the minimum required metal thickness for the lateral forces on the bolting surface. Concideration of the rear raised bolting flanges ( on the backside of the rotors) were added in the calculations. We came up with 0.200" that could be removed from the bolting face of each rotor we had in our possession . A cnc lathe was used to perform the metal removal. A lot of time and effort went into these rotors. I would advice that you don't generically start removing metal from your brake rotors.