383 intake / carb help for my 73 Dart

Increasing your initial timing will help your idle vacuum, which will very likely make it idle much cleaner-especially when the carb is freshened up. It can also help a soggy low end, which that intake might be creating or making worse with the low number compression.

34-36 at around 3200 total timing should be about right for most stock engines, at least as a baseline. Some engines like more, some less. That's also dependent on your location, type of fuel available, and application. But again, it's usually a good starting point. If you exceed that number, time to curve the dizzy