360 Oil Pressure Issues

I too had a 360 over 35 years ago that was hot tanked and I was not aware of the plugs the shop removed during that process. It had good oil pressure on startup but would drop to next to nothing warmed up. It took awhile but I finally found all of the missing plugs in the oil galleys that were missing. Much effort and a set of bearings ,some welch plugs and all was better.