Originally Posted by DAYCLONA
Another item to check off your list, ....sounds like you haven't confirmed the booster to master pushrod clearance when you replaced the master... generally .020 to .060 clearance
This is another weird problem is with the new master cylinder and original booster and the rod screwed in to make it the shortest, I still had to put 4 flat washers on each booster stud to get a little clearance. So now the master is about 1/4" away from the face of the booster.