Thinking of converting to Manual Brakes

BillGrissom said

Try your current MC. You probably don't want a bigger piston bore with disc brakes, since that would make the pedal harder to push. Kind of confused by what you say, because I recall that power brake MC's had a SMALLER bore. That sounds counter-intuitive until you consider the lever arrangement in the booster.

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A larger bore master cylinder will increase the leg effort needed to stop the car. What you want is a 15/16" master cylinder so you won't need two legs to get the car to stop. Order one for a '73 Dart with power brakes. If your car already has the 15/16" bore master cylinder and its in good shape then you are all set. The push rod hole is the same as a manual brake car.

Mopar typically put the larger bore master cylinders on the manual brake cars and smaller bore units on the power brake cars. Should have been the other way around.