Hello and please help. I have restored a 1955 Chevrolet 6400 1.5T. I installed a reman Hydro Vac unit from A1 Cardone and now the rear brakes are locking up. Pressure is not returning to the Master Cylinder. I have to crack a bleeder screw at the unit to "unlock" the rear brakes. Is it possible they did not remam it right? I'm at a lose right now as how to fix it.
