My 40 DLRA's have only 1 vacuum port, on the carb on the passenger side, no port on the drivers side.Will 1 carb have enough vacuum to work with this setup?

Nope you should have one on each port then hosed to a central mini can then to the vacuum. Dual carbs have weak vacuum.

I'm being nice...stare at the next line please....

M A L L O R Y no V A C U U M with G R E Y / G R E Y springs

So do I drill into the blank port on the carb base(same one as on the other carb) and insert a vacuum nipple?Then run a line from the canister on the Distributor and Tee off to both ports?Sorry Mallory is not what I got.Unless you wanna swap even up.