Disc/Disc Parts I. D.
Can any brake gurus tell me how to identify whether a GM master cylinder and prop valve are actually for four wheel discs?
The master I have appears to have the large 1 1/8th piston bore and equal sized large reservoirs, but has no markings on the thing.
The prop valve is machined and appears to be brass with stamped numbers 074-7225 on the body and mounts just below and parallel to the master cylinder.
I've been through the knowledge database until I'm blue in the face and can't find any links that will help identify these parts, heck, they all want to sell their own stuff!