3406B oil temp and pressure senders

Truck is a 90 T600 with a 8TC PEEC engine that has been converted to mechanical.

Oil temperature gauge does not work. Need to know where the oil temperature sensor should be then hopefully I can verify the wiring and repair what needs to be fixed.

Oil pressure fluctuates from 30 to 60. No real rhyme or reason for fluctuation.. it does not respond to rpm. Thinking a bad sending unit or bad connection. What is the location of the pressure sensor?

Thanks in advance

 

Thanks. I found a sensor in the oil pan that isn't hooked up and no wires near it. I'll figure it out when the snow melts lol