Couple of things to help us out would be to completely fill out your profile with engine type and mods done. I assume you have an '89 4.2 with the BBD carb. If so, research the Nutter Bypass here and you can eliminate the stuff on the exhaust manifold. The choke is good to have as well as the manifold heater circuit. Other sensors there are all for the ECU basically and if you Nutter it, they can be eliminated. This will also depend on where you live and the EPA constraints. The Nutter doesnt hurt you with the tail pipe sniffer test but the visual part if the place knows what to look for. Most of the time folks put an aftermarket carb on and the lack of OEM air boxes alerts them to changes.
Your gauges are controlled by other sensors so they are fine. The ones on the manifold tell the ECU how to control fuel mixes and sets the timing for cleanest emissions.
There is a knock sensor, a temp sensor and a vacuum manifold port switch if memory serves. If you need wire colors, I will look at the FSM later for you.