While I'm repairing issues with my 86 GMC Sierra, I've been deleting most of the emissions systems under the hood. There had been previous suggestions to keep the charcoal canister for the fuel system. On the list of things I need to do is replacing a leaking gas tank. I plan on pulling the bed to get to it, and since the bed will be off I will be replacing both tanks, sending units and hoses, selector switch and valve.
While pricing parts my local guy asked if I needed a 2 or 3 port sending unit for each tank. Since the ports are for fuel, return and venting, I'm assuming the vent tube goes to the charcoal canister correct? If I can eliminate the canister, could I just put in 2 port sending units instead of the 3 port units that are probably in it and it still run correctly? It's a carbureted 305 if that matters.