Harms Rebuilt '71 Thermoquad - Wondering Idle, Stalls when Put in Gear

Bewy said

You have two different brands of carbs doing the same thing: varying idle speed.

Something not right with only 11" of vac. It is low, for whatever reason. It is probably causing havoc with the PCV valve. I would disconnect the PCV hose at the carb, & plug the carb port. See if you can then set the idle.

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Yeah, I had every vacuum port plugged on the intake and carb. I mean everything and the idle was hunting and the car stalls when I put it in gear. I'm going to try a carb swap with my other '71 340. The Edelbrock750 would not stall when I put the car in gear but the idle wasn't great (hunting). A TQ swap for a good running TQ should tell me for sure if it's the carb. If that doesn't work, then it's probably engine related like intake gasket underneath or a valve from what the feedback I'm receiving. Thanks to all posters for your input. I plan to do this tomorrow and will report back on my findings.