My dad gave me his 76 land cruiser. It has a Chevy 350. It has 2 gas tanks. I just had both gas tanks sending units replaced and wired into one gauge. I noticed a leak. This leak was coming from a canister thing in the engine compartment. I don't know what it is but I know it is tied into the stock gas tank as it wasn't effecting the aux gas tank. Could anyone tell me 1) what it is and 2) where would the line go that is connected to the bottom of this canister thing? The line is currently missing as that is the cause of the leak. Any input would be appreciated.