My take on the oiling system crossover tube for the small block
Her are my 1/2” pump/pickup tube mods done so far to the high volume low pressure oil pump.
On my setup the heads will be oiled through #2 and 4 cam journal holes as done by factory.
The crossover tube I installed will be feeding Pass. side tappet gallery and feed #1 main/rod.
Supposedly slowing down oil to allow more to get down to #3/4 mains/rods.