upper end oiling question

normally there´s plenty of oil fed trough the cylinder head into the rocker shaft, when i did some oil pressure tests with my new engine (still on the stand, using my electric drill to drive the pump) there was a lot of oil there. The oil flow is timed trough passages in the cam, but with your engine running this does not matter.

Could be that the cam bearings are not exactly lined up with the holes in the block, restricting the oil flow to the heads. Or do these HS Rockers have very little clearance on the shaft?

Ask the engine builder if there´s a reason for the hollow pushrods....maybe you can get some more information there.

Michael