Pushrod cup ends turning blue

The shaft oiling is taken off the main bearing feeds and only oils foe a few degrees of camshaft rotation but it is downstream so to speak of some of the lifters along the lifter galley. I don't think starvation would be a big deal unless the bearing clearances are on the wider side but nothing's been said about the oil system. Personally I prefer shaft, and I might modify the cam to get more oiling... In fact I do that a lot to make sure the oil volume up top is high enough.