[GTX JOHN]

On my old Mopars = I just put a "T" in the Oil Pressure
orifice and I used to mount a Oil Pressure sender from
an 60's mopar with an idiot light in the extra hole =
Hook that to an additional external light. When the
pressure dropped to below about 12-15 Lbs it would
ground and the light would go on. and I knew it would be time to
look for a Mop!