Car dropped 250 RPM and is now stuttering

A fellow Mopar enthusiast came over and we took at look at the engine. He is fairly certain that I have a vacuum leak causing a leannout situation.

The engine rev healthily and the idle comes back when the butterfly is closed up. Without closing the butterfly the car will sputter and die.

I'm going to spray around the typical areas to see if I can find a leak.

Not sure if this matters but I recently switched from two breathers to a PCV. The carb was retuned for the PCV.