master cyl.

famous bob said

Dual piston willwoods in front, single piston in back (I think ), not sure what brand, suspect ford or chevy, could be mopar or aftermarket too!)
Did Chrysler ever have a 7/8" master cyl. ?? Be fine if it just applied a little more pressure , per foot pressure . The engine slows the car down when I get off the gas enough , I never had to get on them real hard before . ??????

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Like I said, if you wanted to calculate this out and actually work out the ratio you have now compared to what your new ratio would be you'd have to know the diameter of all the caliper pistons, including the rear. That's not entirely necessary, since you already know you want the pedal to be lighter and you're not changing the calipers you can just go with a smaller bore master cylinder.

Wilwood and several others make aftermarket master cylinders in 7/8", I don't know if there's anything Mopar that would work in this situation.