Quote:
I haven't touched the linkage because my buddy told me not to $@#! with it 
You are going to have to lean out the idle with the barrel valve linkage, or have somebody do it.
Everything you posted shows it is way too rich at idle. Including when you lean with the shut off valve the idle goes much higher. It is normal when leaning with the shut off valve for the idle to go up, and that actually helps driving in the pits (little/no throttle needed). And after adjusting the barrel valve, readjust the idle throttle blade position. Keep notes.
Don't confuse rich at idle and rich going down the track at WOT. You can adjust the idle with the barrel valve setting, and the WOT with the main bypass pill/jet.
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