1976 charcoal canister hose routing to carter 0- 2543 carburetor

pjogger said
the Carburetor that i want to use does not have a nipple for the float bowl valve.

You should use a carburetor more compatible with the car you're working on.

instead of blocking it off at the canister would it be feasible to route this into the air breather assembly on the outside of the air filter, in that housing?

No, that would be pointless.