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A, B and E bodies used the same pedal assembly regardless of brake type. The master cylinder push rod just bolted directly to the pedal if the car was equipped with manual brakes. The pedal ratio is around 6.25:1 stock.
It finally stopped raining here so I could check the 64 Plymouth. The ratio is about 3-1. No wonder that thing is so hard to stop! Good thing the boy is working out on the leg press...
There is a lower pivot hole in the brake pedal hanger. The way the pedal is configured, there must be a different pedal for manual brake cars. But if the distance between the pivots is the only change (about an inch), the ratio doesn't improve that much (to only about 3.5-1), so I don't think we will gain much.
Getting back to Doc Diff's statement, is the 64-65 B-Body brake pedal the same as 66 and up? Was there a different pedal for manual brake cars on early B-Bodies? The distance between the pivot and brake push rod on ours is 6" and the distance between the pivot and bottom of the brake pedal is 18". Does someone have a original manual brake early B-Body that they can check the measurements of the pedal and location of the pivot on the hanger (lower or higher point)?
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