[citrusz]

I have a 68 GTO with manual drums. Casting number 5452310, with CT stamp.

Can you just add the booster? Can someone post a picture of an original 1968 GTO power drum booster and master?

[68bird400HO]

Originally Posted by citrusz

I have a 68 GTO with manual drums. Casting number 5452310, with CT stamp.

Can you just add the booster? Can someone post a picture of an original 1968 GTO power drum booster and master?

The masters look identcal other than the bleeders.

Can you use either version for either application...yes. You have to make sure you have the correct piston, as indicated by the hole depth, to match the rod coming through the firewall (and booster if power). I believe the shallow hole piston is for power and the deep hole piston (maybe 1 inch) is for manual.