Hi, I have a 1982 Cutlass 3.8, and I'd like to know how to tune the carb. I really only need to know which screw does what, as I cant tell. I found the Idle screw, and that's it. If I could learn to adjust the fuel/air mixture and whatever else that'd be great. Its says Rochester DualJet 210 with the GM logo on the throttle side. Any info about these would be great, Thanks