Bo,
Although it is a little tough to distinguish the colors, I find it interesting that your best dyno runs show A/F ratios around 14/1 to 15/1. So did mine when done at 5200 elevation (Longmont, CO). But when I ran at Bonneville, I jetted down only one size from Loring, from 155 to 152.5 from memory, because it just blubbered away with the 155 jet. I did the last dyno run after Bonneville, 2012, and after I rebuilt the motor with new big end bearings but no other changes other than a shorter exhaust. Why do we get our best readings at 14/1? If I had jetted up to richen the fuel mixture, I don't think it would have run as well, but I didn't try it. (I assume the dyno sniffer determines A/F from exhaust residue, so it should be measuring fuel and/or oxygen in the exhaust and should be independent of atmospheric pressure.) Also on your runs, the little blip in the torque curve at 8300-8400 seems to be consistent on at least 3 of the best runs. Is this a point at which the exhaust and/or the intake is tuned to?
Tom