I used a Mustang dual master cylinder (for a '69 disc/drum car) without power booster and it bolted right up. I had to remove the rubber bumper on the pedal so it could swing back a little further. It works awesome.

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Ryan
-'61 Falcon Futura 2-door, 200ci I-6, 17x8" Bullitt wheels
-'78 F-150 Ranger 2wd, 302ci V8, C4 trans