front disk brakes

Right on track. Read the Scarebird site on which 14" wheels clear their caliper (w/ slight grinding). You can get new 17" wheels in SBP.

Many here use a later aluminum MC w/ 2-to-4 bolt adapter plate ($30 ebay). I did since I don't like rusty, heavy cast-iron. You will prefer an MC w/ a small bore (15/16" or 7/8"D) for manual disks.