slant 6 help. not starting

71 dart with a slanty. i start the car every other week or so to keep things up and running, i went to start it last week, it ran but the idle was really rough and would stall, it had i really bad flat spot slightly above idle where i could open the throttle all the way open and the engine will not rev any higher. i shut it down, tried to start it again and found fuel all over my intake, i pulled the pcv valve hose off and my vaccume advance and there was fuel in there. did my carb go? what happened?
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