Just finished putting everything together for the Fineline, 598 BBC with a Merlin tall deck block. Plumbed, wired, and filled the block with 10 quarts of 15-40 Rotella T. Put an 18V cordless electric drill on the Medlin M77HV pump... and no oil pressure. Kick the drill up to high range and... 10 lbs of oil pressure. This is a fresh rebuild with all new bearings, seals, and gaskets.
Started making some phone calls. Come to find out that this used block had a history of low oil pressure.
I know that it needs to be stripped back down to bare block. Is there anything I can do to check to see what is causing the low oil pressure? Can oil passages be drilled and sleeved? Is this something that could cost me more than just finding a new block?
Looking for some direction here, not pointing fingers at anyone involved (please let's not stir that pot).