416 low oil pressure at idle

My opinion.....the filter is not the issue.

i'm with you ! one thing the builder said, which may have some validity. is that the header clearance by the filter is causing the engine oil to become hotter than the engine water temp which can cause loss in viscosity, he recommended some header wrap to reduce the heat transfer to the oil filter.. is this bullshit by him covering his a?? or is it a good point.