Squeaking Sound Coming from 225 /6

RustyRatRod said
My 64 has the sender in the block on the passenger's side toward the rear.

Photo of the passenger side rear side of the OE ‘68 slant block. The boss on the oil line was present. I drilled and tapped it for a manual oil pressure gauge. As the motor is out of the car I have a plug in the threaded hole.