It's pulling fuel because the power valve is open at idle in gear. That 6.5 is not low enough I bet for that huge cam. No sense in going any further at all with diagnosis without a vacuum reading. That needed to be the first thing you did. It would saved you some trouble. You can throw the jets on the ground when talking about idle mixture. They are not in the idle circuit. Trying to tune idle mixture with jets will have no effect at all. I guess you found that out.