lost all oil pressure but not flow

i can confirm that the oiling holes are in the correct position as when i was building the motor i specifically had to look up which way they went, nevertheless i will double check when disassembling tonight as i have to remove the rockers anyhow


BTW just want to say thanks to everyone on FABO i would be lost without this site the knowledge from all the members and the ability to communicate with so many knowledgeable wrenchers accross the world is priceless, all i've ever done before this build is just basic parts changing and its safe to say this is my first true performance build so i apologize if i seem a little misinformed about things im just a rookie out here trying to build a monster and again couldnt do it without you guys as i have no real world link to anyone here local that has ever built anything to this level thanks again!
on behalf of others on FABO, (many, many more knowledgeable than me, LOL) you're welcome.
If there is absolutely no evidence of galling on shafts or rockers, then my next best guess is like I suggested before, clearance, or rocker to valve geometry issues.
I don't know enough about high-zoot BB''s to comment with much authority, but are the 3/8" pushrods necessary? Perhaps if there are clearance issues, maybe there are diminishing returns on grinding more clearance, if it impinges on intake or coolant passages.