I am indeed. I know nothing of the 58 style booster. ----- Original Message ----- From: "Ernie Stepney" <estepney@xxxxxxxxx> To: <mailing-list@xxxxxxxxxxxxxxxx> Sent: Friday, December 19, 2003 12:27 AM Subject: RE: IML: Fw: Of vacuum brake boosters Brad: I think you are confusing the 58 booster and a conventional vacuum suspended booster. The bellows is at atmospheric pressure until you open the vacuum valve. It works against the brake pedal linkage rather than running the pedal force through the booster piston. Ernie (58 LeBaron on the road Saturday)