Need help with this vacuum reading

Look high & low for vacumn leaks. All it takes is a loose carb,intake manifold or bad line. All carbs, especially eddy's when they get warm seem to hate todays gas. If your car sits days/weeks between startups that can create probs. also without a additive in the tank. I was constantly having stalling probs. with my valiant until I added a phenolic spacer & started using a fuel cocktail. Your coil could also be getting to hot. Is it mounted upright & if you still have a ballist resister set-up most after market coils need the resister they come with, usually like a .85 ohm instead of the factory 1 ohm. Just some thoughts. Good luck.

Oldschoolcuda