daniel,are you putting a vaccum booster on the 1000,or just replacing the master cylinder?when i put that 13/16's master cylinder on that car,i used the original rod which came with the previous master cylinder,which was a 3/4
one,probably from a 120y.you could try finding
the rod from an early 120y & use the bit that goes around the brake pedal.the few times i drove the car before selling the car to frank,it seemed the brake pedal was ok.if you're putting a booster on it,again find a boosted 120y,which has a threaded adjustment on the end.