Manual canister type with 3 lines. Old pump removed by prior owner installing and lost. Installing new so I can test fire it up. The question is where does the 3rd line attach? One line from tank, line 2 to carb...I see no hose for line for line 3. I assume this must be some kind of cooling or vent line. But this car has no charcoal canister to 2nd line running to tank. Ive searched for days on the net. Need some help and advice. Thanks.