It is starting to get above the 200 degree mark and is making me nervous. what tempeture is perfect for this vehicle?

Did you try starting the truck?

Your thermostat may be stuck in the open position. The original thermostat is a 195 degree. Your engine should be warm enough to blow heat in 5 minutes of idling or driving.

Could be one of two things, maybe both, either the water pump isn't doing it's job right, or the radiator is clogged. In either case, it should be replaced.

The middle or slightly below the middle mark is where the needle should be when the engine is up to operating temperature. The middle mark is about 200-220 degrees which is absolutely perfect for GM.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Remove the distributor cap. Mark the location where the rotor is pointing by making a scratch mark on the distributor housing. Remove the distributor adjusting bolt and bracket. Remove the distributor. Replace with the new distributor by placing the rotor on the shaft and turning the shaft until the rotor aligns with the same place as the mark on the old one. Install the bolt and tighten. Start engine. If your engine does not run, remove the bolt and distributor and turn it 180 degrees and replace.

Do you mean there is no heat coming from the vents? or do you mean there is no blower motor operation? or do you mean the temperature control won't change from cold to hot?

If this excessive swaying is due to worn suspension then those worn parts will be tie-rods, shock struts, anti roll bars and the rubber bushings holding the various parts of the suspension in place. General suspension overhaul would be required.
Now if its a normal feature of the vehicle you can improve the handling by fitting harder anti roll bars(sway bars), stiffer shocks, custom tie rods, better quality rubber bushes (polyurethane) and by lowering the suspension with shorter stiffer springs.
I suggest searching for an owners club for your vehicle where you should find some people who are doing the same thing and get advice from those who have been there before - --- You can ruin a cars handling and make it quite dangerous by changing things around, I suggest you search for suspension modification and do a quick 101 of the do's and dont's of suspension modification before you start swapping parts.

You need to warm up the engine, pull out the dipstick, wipe it off and reinsert. Pull it out once again and look to make sure the fluid level is sitting between the marked areas on the dipstick.

is this a 4.3l