[horse482]

Usually AC and GM are the same thing, but most of the time you can pick up the AC a lot cheaper, I like Raybestos pads and shoes myself have had a lot of luck with them. No matter the brand of brake shoes they will work with the gm master cyl. You could also look at a new aftermarket, just stay away from the remans. You have ruber in different parts of the brake system, most of the time you see rubber in the system it is usually from the brake hoses, now that depends on where you have found the rubber.