I have a '46 with huck brakes, but am using '53 brake pedals and associated hardware to incorporate my 235 engine. The master cylinder is a new one for 51-53 trucks. The brakes keep locking up and i have to open up one of the wheel cylinder lines to release the fluid and pressure to get the truck to roll again. Every time i step on the brake pedal, its the same thing all over again. I don't see any kinks in the line. All items on my build are new or rebuilt. Any ideas ? Cecil..........