Re: Up & Runnig Sort'of
Sounds like your float needle is not closing all the way. Either the float is leaking, gas inside it, and it's not rising high enough, or the float tang is out of whack, and doesn't close the needle into its seat even though it's rising to its maximum height. Or, the float needle is damaged in some way and simply won't seal into the seat.
Since gas comes out the air cleaner until you close the petcock, it's a problem with the float needle and seat allowing gas into the carb and overfilling the bowl.