Yes with man brakes the peddle will feel hard and maybe high. If u have a cast iron master cylinder get rid of it! Go to a [salvage yard] an take.. booster, booster-bracket peddle-rod under dash, hard-brake lines coming off the master an propulsion valve,from any A Body. The master cylinder u want to use is the ones that are aluminum with the plastic reservoir. U can get them from any late Dodge van or FMJ Body's. Aspen Volar'e or local parts store. with a core. Last, adapter plate. The old cast iron master has 4 mounting holes, the new style master has 2 holes. the plate lets u bolt the 2 hole aluminum master to the 4-bolt booster. I did this to my 75 Scamp. Don't for get to bench bleed the new master. NOTE: You can not use the very large diameter boosters, they will hit your valve cover!
