Stupid Distributor Questions

I have the same car. 69 Swinger 340/727 with the original AVS. I had similar problems. Check the following:

1. Is there any side to side movement of the distributor shaft while installed in the car? If so, this will cause erratic point gaps and make the car run horribly. The Bronze distributor bushing may need to be replaced. I had mine replaced when the motor was rebuilt. I do not know if it is possible to do this with the engine in the car.This was the case on my 72 Satellite 318 many years ago. An electonic conversion stopped the problem. I currently have the electronic conversion in my Dart, from Summit racing. Works great.

2. My car pings on 87, Use 93 octane for best results.

3. I had a bad stumble off the line after rebuidling the carb. The accelerator pump height on the chart with the rebuild kit was too low. Keep the pump rod in the middle hole, but slowly straighten it to raise the pump height. Some trial and error has eliminated the stumble. Sorry, I do not know the new pump rod height off hand.

Hope this helps. PM me if you need help with this.