Originally Posted by Rons67
The setup I have has a master cylinder with the booster. Is there a difference in master cylinders?
yep, you have power and manual disc, power and manual drum, and power and manual 4 wheel disc.
you may get away with different combos, and i have in the past by just using whatever i had lying around, but one thing you will need to make sure of is that you aren't using a drum master on disc brakes - the residual pressure valve will put the 15 psi of pressure on the disc pads, causing over heating, warped rotors, and frozen calipers. My buddy had been given a drum master for his '69 Bird by Kragan's, and it even went so far as to start eating his tires in the front. badly warped his rotors, and calipers.
He had it jacked up showing me, and when i couldn't turn the rotor by hand, i looked at his master, and knew right away that it was a drum master....the disc is the one that has the bigger resorvoir in the front - because of the disc caliper displacing more fluid than a drum wheel cylinder.
Kragen didn't even show a listing for discs on the '69 Bird then.
When i went with him to explain it to them, they fell over themselves to get him all new parts, and had him bring in the receipt for the tires.