I have an early flathead in my rod. 42 I think (crab style distro). When I start the motor cold I have 60-70ibs oil pressure. But as I drive the oil pressure begins to decrease by the time I'm at running temp 175-195 the needle barely registers maybe 5 pounds. At first I thought it was the weight of oil so I went since I do live in az. Running straight 50 right now and same scenario. Any thought? Posted using the Full Custom H.A.M.B. App!