Got around to working on the block oiling.
Opened the 1,2,3,5 main feeds to 17/64", and #4 to 9/32"
These are the sizes suggested from Chuck Senatores' book.

Andy Finkbeiner suggests 1,2,3,5 be 9/32", and #4 be 5/16". I don't think I need to go that large?

I did open up and tap the oil pickup boss for 1/2" oil pickup.

I also made sure the pressure side from pump to cross and main lifter galley were 9/16".

All other feeds to cam bearings and head/rocker gear are 1/4".