So I'm going to install a different ICM tonight and adjust my timing to see if this fixes my surging issue or at least makes it better. Adjusting the float helped a bit but the car is still funky between 2500-3000 RPM in 5th. It now happens on flat ground so I know the float isn't the issue.
My question is should I set my timing with the headlights on or off. The manual says to adjust my idle with the lights on so I'm assuming I should do the same for the timing. The car idles fine with the lights off but gets rough with the lights on. I'm using a Weber and have not swapped jets yet, trying to save that for last resort.