I have shorty headers. I set the idle mixture screw 1 1/2 turns out from tight and then adjusted it with a vacuum gauge to get as much vacuum as possible. Plugs are new, but have a lot of carbon on them when examined.
Ok, good. We have a student with some actual sense. That's good. Most people don't even know what the mixture screws are. I think we can actually help you. Do you have any way to post a video of the car running.....if it will run? I don't care how crappy. If we can hear it run, that will help. It sounds like a low compression engine someone put too large of a cam in. Don't fret. If it is, it can be made to run.
