Hey,
Another thing you could check if it's still doing it, is the O rings for the two injectors on the throttle body get dry/crack and they don't seal that well then it starts dribbling gas down the carb into the engine. I had a 360 '91 dodge do that, however I think it was too late, the previous owner drove it like that and there was too much gas in the oil, started wearing out the bearings. If you check down the throat of the carb, you should be able to see if the is fuel seeping from where the injector goesinto the carb housing..
How is the oil pressure on your '91? I'm trying to figure out if they had some weird batches of cam bearings from 90-93, I've seen trucks that when warm, idle, the oil is about zero, oil light flickers on but goes back up to 40psi when offidle,driving etc Doesn't appear to be a sending unit or lifter noise or anything.
Good luck!
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