Building a tube Chassis. What electronics can I delete?

I am going to start a tube chassis for my XJ drivetrain. I would like to simplify the wiring and electrical components down to what I need. What sensors and other components should I keep and what can I delete without harm to the overall performance of the drivetrain? I won't be using the heater or AC in the new chassis. I have a 1992 Laredo with 4.0 and AW4. I will be using a D300 for the transfer case.

The obvious stuff is the radio, power windows/locks, window heaters, interior lights, etc. I wouldn't delete any of the engine electronics though, i.e. sensors.

Right, sorry. I meant to say which electronic parts, pieces, and wires on the drivetrain.

You can eliminate the entire instrument cluster- replace with with a pair of mechanical oil pressure and temp guages.