It feeds into the oil galleries in the block that go to the heads/rockers.
There is plenty of oil to the rockers, maybe too much and robbing the bottom end.
I will plumb a gauge into the tee and check pressure when i get it back together

If the pressure is low i will screw an "adjustment tap" into the block here,
then i will move the switch to the next oil gallery plug in front of the filter.
The problem i see with pressurising the rockers is that the timing chain
and dizzy gear then get very little oil.
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South Australia