Hey i am just a beginner tech in school, but i got this car and its runnin real rich right now. The exhaust fumes are gas heavy. Idk much bout these old cars and i havnt tried much. It also has this long term intermittent issue where it stalls from a slow start or a stop n start. Happens maybe 1 time every month. Plus the idle once in a while drops to 400 rpms and the steering wheel will shake real bad. The regular idle is around 700 to 1k. The original owner had a similar issue and thought by setting that little screw by the throttle body to keep the throttle open slightly so that the rpms stayed at 1500 would solve it. He had it like that for several yrs. I just did some compression tests, spark tests and basic fuel tests to make sure all that was good a few months back and they were in the clear. So i dropped the idle back down to 700 and havnt had issues with it since. But it does still have a small tendency to drop to 400 and shake that wheel as stated earlier. Im not too sure what to look into since school doesnt teach us old car stuff any more.