Over the last 15 years I've built two 235's and three 261's with new bearings on a reasonably sized crankshaft,new cam bearings,good oil pump and the rockers and oil feed to the rockers as it should be.All of them had about the same oil pressure 25-35 at a hot idle ,depending on idle speed. And 40-45 running down the road.
I'm just a hobbyist not a pro engine builder,but if your oil pressure is a lot lower ,your engine has issues.I believe some machine shops grind cranks on the loose side because they are afraid of engine seizure come backs.
