Hi, I have a 1967 Camaro with stock non-power front discs / rear drums. I have been very busy the past few years and the car has sat in the garage and not been driven for longer periods of time, upto 6mos. between driving it. Due to sitting around, the brakes have problems. When I drive it, the right rear and only the right rear drum locks up. After cooling down the brake "releases" over time and then I can drive the car again, but then after they heat up, the right rear drum locks again. So, I took about both sides and cleaned all the parts. All the parts appear to be in good working condition, so I replaced both the left and right wheel cylinders and bled the brakes. Unfortunately, that had no effect and the the right rear drum still locks up. I have no clue why it is only the one side and not the other as well. What could be the problem? Thanks, Allen.