Guys I have a dilemma... A long time ago I went with a swap out of my front drum brakes on my 65 Coronet to disc brakes with spindles from a 78 Aspen and then new calipers, rotors, master cylinder and power brake booster.I used a proportioning valve from a chevy system but it just aint working right.... the calipers won't release. IT's driving me nuts.... The rod in the booster is adjusted right so it comes all the way back and does not interfere with the master cylinder return....Any help in curing this probelm would be appreciated...