i havew a 53 chevy panel truck, with a 67 chevelle power booster master cylinder and proportioning valve setup under the hood. my front brakes are very quick to lock up, the passenger side being first to lock up. tried all kinds of adjusting to counteract this problem. back wheels feel as if they're not grabbing at all. my goal is to have the vehicle stop evenly and smoothly throughout. open to suggestions. also, front end is stock, but the rear is from 1986 chevy pickup, if that makes any difference.(brake drums are different)