Group opinion on '69-72 front disc brake parts availablity and quality
 

Hey,

Dropping in from the '66-7 GTO forum for a quick question:

Planning a conversion soon for my manual drum '67 convertible to the power disc setup from a '69-72 GP, reported to be a weekend bolt on.

Used setups are typically pretty worn and beat up, so wondering about any experience you have with the current state of the aftermarket, doubting GM / ACD still lists any of the parts for anything that needs replaced if grabbing parts from a derelict.

Or, if you are going to a badass aftermarket system and are selling off your setup, shoot a PM. Thanks!

Pay attention to the rear cylinders, as I suspect your master cylinder had residual pressure valves that might go away when you convert to a disc master.

Without those valves, some rear cylinders can suck air back in and trust me, you can pull your hair while chasing your tail to figure out why you keep getting a soft pedal.

Rear cylinders with "expanders" in the cups will probably be enough to prevent this, and an aftermarket residual pressure valve is a back-up plan.