You don't want to have it go from the Charcoal canister to a vacuum source. The purge valve will direct it into the intake via either the vent or a TEE. A vacuum line directly to the cannister purge would cause the cannister to flood.
If you have an aftermarket air cleaner on the base you may have a capped vent which you could use. Just be aware a backfire could cause an explosion if a check valve isn't used.