Quote Originally Posted by robot View Post
just to start, are you sure you have a disc/disc master cylinder? are you sure you have a power brake master cylinder (not a manual brake cylinder)? your symptoms are common to using the wrong master cylinder.

Here is a couple of hints: Master Power Brakes - Master Cylinders

mike in tucson
yes this is a disc.disc m/c and the booster has clearance to m/c pedal has clearance, booster unhooked from vacume, all wheels are free go down road 2 miles start gaining pedal brakes dragging ??? come back cooled off same thing over again