"it does run good" should be your main goal.

really big cams (you know, the ones that barely make any power below 5000 rpm) like quite a bit more fuel outside of their operating range to...

an o2 sensor is only reliable when targeting a range near stoich (14.7:1 with normal gas).

playing with o2 switch points might get you a 1% change or something which probably wont be noticeble,...