early a master cylinder swap

I did exactly this on my '62 Dart with 10"x2.5" drums. (It's a 1st year B body, but the brake hydraulics don't change.) The original single reservoir MC was 1" and I put in a 1" dual reservoir MC for a '67 Coronet. Works as it should; has the old stadard heavy brake feel of the older manual brake cars. The brake pedal rod pulled out of the single and went right in to the dual and was the right length.

I made the change for exactly the same reason; I drove single MC's when young but this car is very nice and I'll take that as the one non-original piece on the car to add some safety margin.