Is the oil psi sending unit on the rear top of the engine (1988 350) like the older 72's?

mine is or was, i put in an after market gauge and ran the line to spot just above the oil filter. the original was where you said.

My 88 actually came with 2 sending units. One up high in usual place for the gauge and 1 on the side for the computer. It shuts the fuel pump down if low oil pressure is detected. The dual senders were discontinued a year or two later.

My 88 also has two sending units. Right now I have a mechanical gauge and the computer gauge on a tee fitting on the side. Will it make a difference if I had the mechanical gauge on the top instead? Also what is the point of having two sending units?

MY 86 had it just behind the dizzy

Thanks, mine is wigging out, it looks more like a richter scale than a psi gauge.
It will bounce from zero to pegged & hit pegged so hard that you can hear it hittting. They want $36.00 at the local parts house so I'm gonna see if I can clean the connections first.

The reason for 2 sending units was 1 for the gauge and 1 for the fuel pump. If oil pressure goes below a certain pressure the fuel pump will be turned off as a safety to save the engine. Since then GM went back to 1 sending unit but wired both the gauge and fuel pump to it. And there you have it.