1966 Dart troubleshooting

**Update:

Car was left sitting for 5 days and it started right up and now starts fine. Don't know what that's about. Idle screw is now 2 turns out as suggested. Still having same problem. Car starts right up and idles fine in P and R but in D it'll seem like it's fine but once you're off and driving once you need to slow down to a complete stop it stalls out somewhere from 5mph to stop. Once this happens and you re-start the car and put it in D you need to hit the gas quickly or it will usually stall out right then and there. Also stalls out when rolling into a parking lot at a low speed if foot isn't on the gas. I'm often left "coasting" with it stalled out. This is in addition to sporadic acceleration when laying on the gas. Embarrassing.

I have a Valiant service manual for 1966 so it's relevant. So eager to fix this not because I want the car running, but simply because this is such a new challenge to me. If you have any more suggestions please let me know! Thank you!