I need some fuel sending unit experts please

10 ohm resistor between the Oil pressure gage connector and ground should bring the gage to H or approximately 80 psi
22 ohms resistance should bring the pressure gage to show middle, and anything over 75 it should show zero.
So either high resistance or no connection would keep the pressure gage from working.

PS. Like the fuel gages, replacement oil pressure senders aren't matched to the '60s gages.