[HawgRyder]

I tried to find out what the overall elevation changes are for the track, but haven't found them yet.
So...my first guess for the lean or very lean condition on the affected bank would be the tuning (effective A/G ratio) on that bank.
Perhaps the engine was tuned on a dyno at a higher elevation and the resulting difference on the track put the ratio at critical.
Just my first impression.
Also...I have run into conditions where the torque of the engine and the side gravity of the car add up to fuel starvation in the carb system.
I have not worked with PMO's....so the question would be about the orientation of the fuel bowls....do they tend to fuel climb on one side?
The track appears to be right handed...so the majority of the turns will send the fuel up the left side of the bowls.
Just my $.02
Bob