86 GT Brake Upgrade (Page 2/2) Challenger APR 18, 06:41 PM Thank you I'm really not concerned with parking brake only use it to pop the trunk even though I finally figured out how to adjust correctly. Have never used it in the 48k miles driven. In reference to your question about power booster filter I am concerned with the 20 + of years on plastic and original rubber ,strange things occurr with heat back there from engine and cat. Which has been upgraded recently to newer style with much less heat I figure the filter has served it purpose along with booster check valve. I am outweighing the choice of GA rears opposed to Saville which it seems with some effort some cable changes bring back p/brakes. Wondering about different piston dia.of both will upset bias of system although it seems most people say the GA in rear is the perfect swap others say no so I will have to ponder that. Some say just changing pads on OEM to softer material will work out good.There is a lot to consider here most guys on this forum have been down this road before with success either way,I was honestly trying not to make this a crap shoot. Thanks for your input Challenger