I have done similar thing by just joining one side to the other, useing 1/8" NPT brass fittings to ensure pipes seal, usually is oil pressure to at least one side if no oiling to one side problem.

  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia

This is what a p.o. has done to ensure oil supply to the rockers

Possibly unnecessary these days with 360* cam bearings, but interesting, and neat.




Tee into oil gallery



1/4 copper line runs behind block




runs through hole drilled in rear of valley. Pipe is just siliconed.




hole drilled in rocker oil feed gallery.
Pipes appear to be interference fit.

.


South Australia