So what's the deal? Which carb is the right one?

So what would be the harm if I simply capped the charcoal canister nipple where the canister-to-carb line goes? If I end up using the 902 carb (the NOS one that doesn't have an attachment for the vapor return system) that would effectively isolate the charcoal canister from the engine and eliminate a lot of underhood plumbing. What's the harm in this? Would a lot of gasoline accumulate in the canister?
Go read the article I linked for you to learn why your idea is not a good one.