[T77911S]

well you have already screwed with the mixture so now class is in session, and by that i mean you can now start "playing: with things and learn more about your car.

but, before you do anything else, you need to first make sure the ignition is in top condition: new plugs, rotor and cap, make sure the timing is set properly and the advance is working and you need to make sure you have no air leaks. a smoke test is the best way to check that.
all of this needs to be down because it all effects mixture.

now you need to check fuel pressures. you need to check system pressure, cold control pressure (CCP) and warm control pressure(WCP). if those are not is spec, that needs to be resolved.

once all that is done, NOW you can go back to mixure adjustments.
you dont need a special tool to do this. the long 3mm allen from one of those craftsman sets work perfectly.
right or CW makes it richer. R= rich. CCW = leaner.
there are several ways you can do this. once the engine is running, you can reach in and raise or lower the sensor plate to figure out if the mixture needs to be richer or leaner. i only do this if the car wont start and suspect the mixture is way off. to me this is more work, although it will tell you if it is rich or lean.
you can also adjust the mixture rich until the rpm's drop and then lean until they drop and then set it in the middle, or i usually start with it more to the rich side of middle. then i blip the throttle and if the RPM's drop below idle then come back up, it is too rich. so i lean it out a tad and repeat.
in the end, set it so the RPM's have just a very very slight dip when returning to idle or no dip at all. but want it right on the edge of trying to dip down when you let off the gas.

after you have done all this, you can still go have the mixture checked with an analyzer just for peace of mind. even though i have an LM2, i have found that this puts it right where it needs to be so i dont even get it out anymore. right now my RPM's drop staight to 900 and stay there. no dips, no surging and my decel valve is removed so the RPM's drop quick. (it was removed becuase the RPM's where hanging and not coming down).