This has been discussed.

Solid lifters or solid rollers I assume.

The left (drivers) galley does nothing but oil the lifters. It is just a big oil leak at the end of the right passage and should be eliminated. You can plug the passage coming from the #1 main up to the front of that galley in the bearing saddle or behind the cam thrust plate. There is no oil needed in that passage. Put the rear plug - behind the distributor - back in to seal it.

The right galley you are pointing to can be massaged to relive some corners and restrictions, but that one needs to be kept full of solid oil under pressure, all the way to the front chinawall, to keep the engine alive

I much prefer lifter bushing to tubing.

#1 It is not easy for a DIY to bore that right passage and keep it on center due to the lifter bores allowing it to veer off
#2 Bushing corrects the often times mis-machining of the lifter bores
#3 Corrects for wear and supports the lifters better
#4 Oil galleys can be kept pressurized, bushings drilled to oil hydraulic lifters and 16 large oil leaks are eliminated
#5 If you use the wrong copper material and break a lifter bore out trying to peen it, you won't be the first person to have done that.

Beyond that, other modifications and restrictions can be done to keep the oil on the crank instead of flying off to other destinations in high RPM applications.