My take on the oiling system crossover tube for the small block
I've been building motors for 60+ years
I will consider what YR has to say seriously
I will probably learn something new
I remember when we got billet sbm cranks made the manufacture changed the timing and did not like "cross drilling"
about the cross feed- don't hurt
but you are trying to maximize flow to the feed for rods 1 and 2
"Keep your eye on the prize"
I have a long step reamer that I have not used in many years for the tubes
bushings are the way to go
as you can true up the indexing, lengthen the lifter bore, and fine tune the oil leaks