Andy,
I have a B1 original style cylinder head engine.For the oiling i actually made my own tubing and fitted nitrous nozzels (4) per each side and ran them to the back of the block with a simple manifold that picks up of the back oil passage.
the nozzels are faced right at the back off the rocker and valve spring and is more than enough. i grubbed screwed the oil passages in the block that feed the heads as i am using T&D induvidual shaft rockers.
so all oiling now comes from the nozzels. i screwed them into the rocker covers and they work very well.
Regards simon

H.R.E Hippo race Engineering.