My friend Harlow told me my rear Aerospace disc brake kit is on the way. I allready have them on the front and have stock drums on the rear. It stops ok now but I thought it could be better. You guys with 4 corner disc, will I notice much of an inprovment. It should take some weight off the car also. I cant seem to get to the track because of the heat and rain so I thought lets work on the car. Will I need a adjustable proportioning valve with this? I currantly run a mopar performance master cyl. without a prop valve. now, and have to adjust the rears up a couple of times a year.