Reply to "Brake booster"

As Detonator did, I replaced my leaking OEM with a Precision Pro-formance GM conversion assembly. Not quite a bolt-in since you must cut the ISO bubble-flairs off the stock hard lines and add SAE conical flairs to fit the GM master. And on early cars, there may be a small amount of interference from the slightly larger dia. booster can with the inner left fender and the front trunk floor. Both easily fixed with the requisite Big Ball-peen Hammer. And some clutch masters may touch the larger booster, also needing a bit of grinding or a small dent. I had none of these on our Sept '72-build Pantera but others have mentioned them.

On the positive side, the GM assembly uses a larger aluminum dual-diameter master cylinder piston (front OD is larger) that is rebuildable and a dual-diaphragm booster with a built-in residual pressure valve. Weight of the more effective converted GM is almost identical to the OEM. In addition, I've had nothing but praise for Precision Proformance and Bob's business practices. Good guy to deal with.