My 68 is a manual disk car. The master that was in it when I got car back in 1977 or so was not the original and thou it looked correct minus delco markings , actually had the residual valves at both ports and explained why front disc had a heavy drag. Removed front valve and all was good. Fast forward to 2012 and thou car is now in progress resto bought the new master and questioned whether it would work w/manual disc and vender put me in touch w/MBM and rep said no problem. When I got it I immediately checked to make sure there was no residual valve at front port and there wasn't,,,, and wasn't one at rear port either! Another call and none of the masters that MBM manufactures have a residual valve for rear drum and if you have a problem w/rear brakes you can add one. ???? OK will see. So long story short the new Masters that most vendors carry are made by MBM and should work though I still have no seat time to say otherwise. Also hang onto your original hold off valve cause the repop wont seal a 3/16 from master to valve. Seat is about .060 deeper than factory valve and line ferrule nut will bottom out before line is seated.
__________________
Leo
|