Hi all, I am looking up disc brake conversions for my 67 GS, and I was wondering what the difference between 68-72 and 67 disc brakes would be for A-bodies, and if the later discs could swap onto my car?
All depends on the wheels... The 14'' rally wheels that came on the 67 are a bit small for the 68-72.... The grinder will make them fit... the factory 67 disk brake caliper were a dual piston VS the single 68-72.
If you have 15" Buick wheels, you can put the 68-72 spindles on the 67 car and they work just great. If you want to be 67 specific, that's not as easy.
67 GS Disc brakes used 4 piston Delco Remy calipers which were prone to leaking, due to the seal being fitted to the piston rather than the housing , there may be newer redesigned versions available , original calipers can be sleeved at a cost , 67 GS came with Camaro rally wheels as the type 57 Buick wheels will not clear the caliper ,69 and later single pistons calipers are I think a better solution , however they will not clear the 14 “ rally wheel without a little grinding of the caliper and pins , not recommended , as knucklebusted says 15 s are ok , someone may know if you need to change stub axles , master cylinder, or at least remove the retention valve from the exit port ( with a self tapper )also brake hoses , 4 piston calipers use a small metal fluid pipe and mounting bracket from the hose to the caliper at the wheel , single piston hose only to the caliper
Later model 14" disc brake Buick chrome wheels will work. I'd change master cylinders since the 4-wheel drum master doesn't move enough fluid.
Check out Inline Tubes offerings. The sell everything you need for the swap. I am using 70-72 used factory disc pieces on my 67 and the 1970 master/booster from them. I already switched to 15" Buick wheels. You need to figure out which Buick A body configuration to go with: 1970 GM A-Body Power Brake Upper Kit With Factory Hold Off DBK7002A 1967 GM A-Body Upper Conversion Kit With 11" Booster DBK6702A 1968-72 GM A-Body 1968-74 GM X-Body Disc Brake Conversion Upper Kit, 11" Booster DBU01 I think Todd has an account with them - ask him.
