Update.
So, turns out the "repop" booster did not work out. The mounting surface on the booster that the Master cyl. mounts to has a counter bore (recessed) on the repop. Booster that was removed does not have this recessed bore. When the master is bolted to the new booster, there is a preload situation on the MC piston.
I got a block down the road and had to bring her back. By the time I got to my driveway. The brakes were fully engaged and fighting the 396 all the way.
Put her up on the stands and all four were locked up. Removed the Master mounting nuts and brakes released. Booster came from Camaro Central. Going to call them in the morning to see if they have a correct booster that will actually work. If not, I may have to get the old one rebuilt.
Any suggestions for an aftermarket booster that is closer to factory specs or a source for rebuild (close to Utah) would be helpful. Also, anyone encountered this situation?
Craig.