Robin, I wouldn't disconnect the charcoal canister. There's a reason that all 49 State cars built from 71 up (CA earlier) had this component: something like 20% of the lifetime HC emissions of a car result from raw fuel evaporation. Those are emissions that occur even while your car is parked. The non-vented fuel tank cap and charcoal canister system (with carb bowl vapor recovery) totally eliminated that problem and at no loss of performance. Leave it be. My .02 Pete in PA From: "Robin Giesbrecht" <robings@xxxxxxxxxxx> Subject: IML: 72 gas vapours Date: Tue, 18 May 2004 11:30:01 -0700 Reply-To: mailing-list@xxxxxxxxxxxxxxxx I want to install a surge tank for the rad on my 72 Imperial. Already pulled one from the wrecking yard off a later model mopar.But there is a canister in the spot where I want to mount it(right sidof rad). This canister is sucking gas fumes from the gas tank and the carb back into the intake. Vacuum can be plugged, carb vent can be left open but wha5t about the gas tank vent? Is this the only vent for the gas tank? If so I suppose I will have to route it somewhere relatively safe. Any ideas? Robin Giesbrecht