1986 Jeep Cherokee 86 Cherokee won't start

Engine Performance problem
1986 Jeep Cherokee 6 cyl Four Wheel Drive Automatic

I have a 1986 Cherokee, 2.8L V-6 that wont's start. The engine turns over strong, gas is making it to the carb and the plugs are firing. This all start about a 2 months ago usually when the engine was cool; sometimes it would start and sometimes it wouldn't. It was very sporadic. Once it started, it would usually do fine for the rest of the day. Then about a week ago, it just failed to start completely.