Now let's talk about the mechanical and maintenance items. This is a complete list of what has been done so far:
1. ALL fluids changed. Brake fluid, trans fluid and filter, coolant, power steering, front axle, rear axle, transfer case, oil and filter....etc.
2. New brake rotors, front and rear and new pads front and rear. New parking brake shoes and all adjusting assembly.
3. All 4 oxygen sensors.
4. Trans Corvette servo.
5. All 4 KYB shocks for Auto Ride Suspension.
6. All cooling system hoses and new tees at the firewall and new reservoir and cap.
7. Both belts and tensioners and idler.
8. New MAF and MAP sensor.
9. New Cam and Crank sensors.
10. New plugs, wires, air filter and clean throttle bore.
11. New rear upper and lower control arms.
12. New high mounted third brake light.
13. New transmission cooling lines.
14. New thermostat.
Just discovered your post now. PNW VietVet, I'm rebuilding a 2001. People throw away a lot of good parts. The oxygen sensors are likely just fine... If ambitious you can double check with a wideband O2. If really wanting to replace them replace the front two. Forget the rear ones as all they do is make sure the Catalytic converters are in optimal shape.
I'd also look at Bilstein 5100 (and if using off road the ones with remove revivors).
8,9 Not really any need to replace sensors. Especially the cam sensor or crank sensor, they are Hall Effect sensors and not much of anything to wear. Your harness will wear out before they do. You can clean the MAFS if you really feel necessary. If / when you tune you can validate their accuracy to make you feel more comfortable, but if you have any issue with the cam or crank sensors you'll have some really funky stuff going on with timing, so you'd know immediately if there's any issue.
11 you can put new bushings on your controls arms... But if there's no squeaking, no play, why bother messing with them?
13 Transmission controls lines are very durable, I'd not bother. I'd replace the coolant lines on the motor first.
14 Does the thermostat stick? Just replace it when you do the hoses... Do a coolant flush kit before you drain the fluids out. I built a kit to hook a garden hose to the heater core and pumped water through the entire cooling system after I drove a couple hundred miles with the flush in there.
Another note, you can pull all your seats, remove the rug, hang it up and clean it more aggressively. You can get them to look new this way by REALLY flushin the dirt out. I'd put the rubber floor in the back section though. There's some Youtube videos on making your own carpet cleaning solution. I used OxyClean, laundry soap, a concoction of things. Then sprayed scotch guard over it before I put it back in the truck.