I have a Gen 4 454 30 over / has an M77 Moroso oil pump w/ welded and bracketed pick-up with 50-65 psi @ idle / cold or hot, oil pressure drops to around 10-20 psi after 28-3K rpm. Bring back to idle / 50-65 psi immediately w/ 20/50 or 40 w oil. A mention of pickup to bottom of oil pan was made / oil cooler system failure (22” cooler) w/ 12AN line ...