Crankcase ventilation

[speED]

I think we need more information. Are you getting excessive blow-by? Perhaps enough air is coming through the PCV that you're leaning out the back cylinders (which you already know, I think). It might be worth putting a vacuum gauge on the line coming from the PCV to the carb to see if you are getting vacuum or positive pressure there, especially at part throttle and idle.

Forcast is ran the next day or two, but I'll put a vacuum gauge on and let you know. Yes, the pcv is the cause of the lean condition. I do not believe I have excess blow by. I'm pretty sure all my problems are occurring as i go down the highway. At 55mph, I spin 2800 rpm - with very little throttle I think the vacuum is too much for the pcv valve.