2 bbl too 4 bbl vacume lines

Swapped the stock carb and intake out for a 4 bbl intake and quick fuel vacume secondary carb. I am wondering about the vacume lines they went to the charcoal canister originally with the tank vent and PCV (witch was gone).I'm wondering if I should run the vacume line there or or can I just go from carb to distributor car is a 72 with 318 bone stock except for the carb and intake. Also should I cap off the canister if I dont run the lines to it ?