Let's add the oil timing as the cam journals line up to pulse the oil to the rockers.
Some worry about too much oil to the top 'a more typical chevy woe'.. you can make a decision to use full groove mains and that will up the ratio of bottom vs top priority.
Some used to clock the cam bearings off a hair ..that's all 3.. but incorporate a full grooved cam journal as does Rubens cams who grinds for a handful of brand names...or simply offset grind the cam bearings feed to keep full oiling to the journal yet still limit supply to the top. Many rocker arms and their different diameter oil feeds and locations..mostly remedied by the , again.. by the usage if a full grooved rocker bore.
As for the oil supply at the head.. if aluminum..use a small long triangle file the make a tiny groove up to it if need be.
