I hooked back up the HVAC controls in my car. After the engine swap, I hadn't hooked up anything to the vacuum except the brakes and distributor.
There are 2 vacuum lines sticking out of the firewall. 1 of them goes straight to the manifold. The other one goes to a canister and then the intake. My heater stuff seems to mostly work again. But I do hear a little vacuum leak. And that sound changes depending on where I have the selector. I'm thinking maybe the vacuum switch is the culprit.
Other than that, I got the ol' girl out on the highway and let her stretch her legs.