Brought Dart to shop to fix idling issue and car runs like s**t!

I wanted to answer a couple of questions that were brought up. There is no choke on my speed demon carb. Therefore you have to feather the throttle for a few minutes until the car warms up then idle should be stable. Second I did have a vacuum leak when I re-assembled the engine. That was because when I reassembled the engine the original builder didn’t use valley pan and intake gaskets and dumped on a ton of silicone to seal. Real cheap fix. I had the intake cut down .040 to account for the gaskets and the pan and intake lines up perfect bolted on no more vacuum leaks.