Carb Swap - What to do with Vapor Canister?

[Newt75]

I recently replaced the stock 32ADFA carb on my '75 with a rebuilt 34ADF. I now have no ports on my carburetor to accommodate the vapor canister. I was about to tear the whole thing out (no real need for emissions components here in MI) when I realized that there is a hard (fuel?) line run from the back of the car. I believe this to be a vent line from the fuel tank. Is it acceptable for me to plug this line near the vapor canister? The last thing I want to do is plug the wrong vent line and collapse my gas tank.

[architect]

I was in the same boat... deleted the entire system.
It’s fairly straight forward if you search my posts. A few plugs here and there.

Biggest thing (and this left me stranded for a tow home) do not plug your tank.

My vent line was already “plugged” with dirt and crap. I simply replaced the three way hose manifold in trunk and rought a hose with filter to the underside of gas tank. Works like a charm!

[TwinFast]

I now have no ports on my carburetor to accommodate the vapor canister.

It's a good opportunity to remove all this stuf !

[Nanonevol]

Keep the cannister to filter your tank vapors as suggested. You don't want to vent it to the environment. Won't hurt your performance a bit, obviously.

[samakijoe]

If you keep the vapor canister without a connection to the intake manifold, it (the canister) will eventually fill up with gas vapors. Without the vacuum from the intake manifold they (the gas vapors) will just go into the air. The design intent was to have the intake vacuum clean out the canister every time the motor is run. Back in the old days (before all the EPA rules went into place) this was a big issue. These days with only about 0.0083% of the cars still on the road with "pre EPA" pollution equipment installed, I don't see a problem with a little gas vapor floating around.

What was it he said? "I love the smell burning gas in the morning".

[BEEK]

On my current build. I am taking the vent line to a port on the air cleaner that I am making. Venting the vapors into the air cleaner. No charcoal canister just a open vent to the air cleaner. Will not have any real vacuum on it as the filter will be free flowing. It will keep the tank vented and allow for air to pass into the tank to replace used fuel. just my way of doing it