Wilwood M/C recommendation. Bore size.

Several months ago I talked to "Jeff" at Wilwood about my 65 valiant, manual brakes, 9" rear drum with Willwood disk conversion in front. He suggested 15/16" or 1". I have not yet ordered up the parts or done the job, though. FWIW, you can call Willwood and ask them their opinion on your setup. Based on the above responses I'm wondering if I should consider 7/8! I guess it all depends if I would run out of Travel. From my notes: he expected the pads to only move about 1/16 of an inch....