Oil Pressure Sensor adapter.
This Adaper screws in in place of the original LS oil presure sensor. You can then screw any oil pressure sending unit that uses a 1/8thNPT threaded oil pressure(most 67-87(91) oem oil pressure sending units are 1/8thNPT) sending unit into it. Note that some trucks used extra large oil pressure sending units. These can interfear with the intake manifold in some applications. Something to be aware of but normally not a big issue. This approach makes keeping your c10s stock oil pressure gauge super simple. You’ll then just plug your factory oil pressure sensor wire into the oem c10 oil pressure sending unit which would be threaded into the adapter.
Temperature sensor adapter
you can use these to adapt your c10’s temperature sensor in most cases. Just be sure to verify which size thread your oem temp sensor is correct for the adapter you get. Dont forget to check out the Temp Sensor Guide for more about using one less temperature sensor.