There could be a ton of gas in the manifold.
Crank that sucker with the throttle open a bit. Feed it enough throttle
to keep it running, and see if it clears out in 5-10 seconds.

You should at some point check for gas in the oil if the carb dumped
gas into the manifold.

Dave

You could still be describing problems with the float needle.  It sounds
like it is just letting a little in and it just runs the float bowl
dry.  How's the gas pump and fuel filter?

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
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I use a metal baking tray for just this purpose.

I agree mostly, but I have found that if a carb gets all varnished up
inside that if it is used on a vehicle that is driven infrequently, it
will work fine once the car is running but when all the gasoline
evaporates out of the bowls and then you restart it, the float(s) may
actually stick to the bottom of the bowl.  I have had this happen both
on a '69 Valiant (Holley 1bbl) and a '73 Chevy pickup (Rochester 2bbl.)
 In any case, though, disassembly and cleaning is the fix and adding an
inline filter is never a bad idea.

Oddly enough, in both cases I ended up replacing the carb anyway.  The
Holley because the metering block literally disintegrated when I put it
in the dip bucket, and the Rochester because it couldn't keep an
accelerator pump in it for more than a year, no matter what.  The
Valiant is probably running to this day with the Carter that I put on
it, and I know the pickup was running well for years with a junkyard
Q-jet which lasted over a decade before being replaced with an Edelbrock.

nate

Usually from letting a carb sit with fuel in it until the bowl(s)
evaporate dry. The nasty additives in modern fuels make a pretty good
approximation to super glue when they dry out, and the float sticks to
the bottom of the bowl where it comes to rest as the fuel dries out.

But it can also happen on a "remanufactured" POS carb from the parts
store due to shoddy assembly work. I'd say more than half of the "reman"
carbs I've seen in recent years have some gross assembly error in them.