help with holley 2 bbl vacuum hoses

can I use a port right from the carb to the a/c ball. My Duster is set up that way right from the carb but this is a 2 bbl and I dont know which one would be best.Or I could pull the plug on the top of the manifold tap and put a 90* fitting to the brake booster. which one would be best.I have the PCV done. I am waiting for the a/c ball to get here.