Hooking distributor advance to intake manifold port.

I'm trying to give my car a budget tune up and enjoy a few drives with whats left of summer. I've been reading/researching and have determined that hooking my vacuum advance to a manifold source is probably the best way to go for my application. Oddly enough what should be the manifold vacuum port on my Carter AFB has no vacuum at idle. I plan to rebuild the carb this winter and will hopefully figure that out then. For the time being is there any reason I can't connect my vacuum advance to a port on my intake manifold? (there's a capped spare there already) Thanks!