I replaced the hydroboost on my 96 6.5 and afterward the brakes are partially applied which progresses to fulling applying as they heat up. I have concluded the rod in the hydroboost must be slightly longer and when the master cylinder is bolted down it pushes in the piston. I have read online about a washer that can be missing that allows the rod to fall off center and not insert into the center of the master cylinder piston. It appears the washer is on the replacement booster and the rod is centered. I am going to also replace the master cylinder as well because it appears it was leaking slightly but I do not think that will cure this problem. Is there some sort of adjustment of the length of the rod I missed maybe from the pedal side? Otherwise what might I do to correct this? Can I insert a washer or 2 on the studs before mounting the master cylinder to shim it up? Or did I get a bad hydroboost?