The air leak is something you must look, sure.
Because of leaving your car sittin for a long time, you should let it run for 5-10 minutes i say, so the engine, the fuel lines and the carb come to their senses. That's what i do after a long period. Well, because you mess the mixtures for good as i read, put the factory settings again (i think it's 3 turns from closed for the HSN, and flat poosition for the other 2 needles). Now, try lean the HSN first a quarter at a time. Because your engine will be hard to stay at idle because of the too rich mixture, have some throttle so you keep the engine running. Don't mess with the LSN, first set the HSN and try to accelerate SLOWLY each time untill you find the optimum setting. Then, tune the LSN. If you read the manual, you will see that most of this stuff i am telling you is in there, but i'm not talking as a reader but as an experienced man with Vspecs. Good luck with that