If you are talking about the fuel filters that were used in the 80's with a third nipple that comes off the side of the "can", that isn't for a "vapor" line. It's for a return line to the tank. Raw fuel will come out of that line. It should be routed to the tank...not a charcoal canister.
Okay so I would be able to tee that back into the fuel tank using a fuel sending unit with the extra fitting, this will help with my hot starts? Tried the heat insulated don’t like how it raises my carb up.