Low output at idle w/ac on?

Thanks for these suggestions!!! It’s been a rough couple of weeks, I’m working on multiple projects, getting one ready for the Duck Tape Drags in Tucson next month and another ready to sell and on my way home from my 40 hour, Whitey (5th) lost all coolant from the top of the aluminum timing cover!
In all my years I’ve never experienced this happening. It must have had corrosion I don’t see when replacing the timing chain and water pump.
So… the 5er is parked for now. Too much on my plate to mess with it right now.