Valve cover seal was new with top end service I performed. I was beginning to suspect that too when I looked back in and saw its only about 3mm from valve cover gasket to the exhaust gaskets and the exhaust gasket would act as a dam hence the apparant "leak" at the exhaust manifolds with no oil sources I know of there. It also makes further sence since I saw oil collecting at the rear of the head back towards the tranny dipstick/filler tube.

Thanks for the input, I'll try what you suggested. Will probably remove the valve cover, clean and inspect mating surfaces etc at my next oil change which is soon.

Thanks!