uncle tony's garage gets called out by the roadkill guys

You may well be right.....the tailpipe says the opposite, but I know how carburetors can foll you sometimes too. I will say this......It's been lean "everywhere else" so far. Primary and secondary jets. But I wonder......could the lean idle condition cause the hot long crank issue? I would think that would be rich instead.....but I know what happens when I think.
Well I'm reading some used plugs, from not so great initial tunes. Buy one new plug at least and you can have a better idea. Trust me. You could very well be on but those plugs are effing smoked and they're not going to run right. Once a plug cannot clean itself it's done. They've never run right for me at least. Make sure you dont have fuel push over after shut down.