carb help

Ok i think i found the problem, after pondering through numerous web articles i figured out how to adjust the carb, i noticed the curb idle screw was adjust in to far and the fast idle screw wasn't at the same point, so in turn when the choke opened the car would die. I adjusted that and know when the choke opens the car still stays running, its missing pretty bad still. I adjusted both mixture screws out 2 1/2 turns. If I put new plugs in will I be alright for awhile???