You can always install a T on a manifold vacuum line. Readily available at any auto parts store, along with the tubing. Take a piece of existing tubing in with you after test fitting to the vacuum canister. The ends will be a little stretched on the old tubing so you may need to snip a little off to get a good seal on the tee.
Vikki 1969 Goldenrod Yellow / black 400 convertible numbers matching