I know this is going to sound crazy buy my Dad would not run Fram
oil filters on a Ford. Told me to run Motorcraft FL-1A. I have always done this except with my new engine and never had a
oil pressure problem. With my current 427 I am running a System One re-useable
oil filter. I maintain 50 psi all the time after start up which is usually about 60 psi. As I rev it up around 6000 RPM my oil pressure doesn't climb significantly only 60 - 65 psi max.
Clois