[RICK LAKE]

AR-_cobra Any chance of a first name?? It sounds like you are still air bound. Try this, remove the stat and but 2, 1/8" holes in the thermostat housing, about 180 degrees apart. Make sure and check the temp on the stat for when it opens. It said on the bottom of most stats. I am guessing you are going with a 180F stat. Install stat with 1 hole at the top of the opening. Refill the motor slow. Jack the front end off the ground as high as you can go without hitting rearend. This will take some time. Fill and let sit. When the level drops no more, cap it and put car down. Have a good size catch can for over fill hose in it. Run car until you see thermstat open and temp drop on gauge. With out fans unless temp gets into the 210F range then turn on fans. Let motor cool off and repeat this a couple of times. After 3 times make sure the level is 1/3 up from bottom of tank. Go for a drive and see what happens with motor temp. Side note, does your car have a heater?? This could also be the problem of air trapped inside causing over heating?? As far as the fans and when they come on, let fix or fine out what's going on with motor first. You get no white smoke from exhaust pipes?? after 20-30 seconds of running? If this doesn't fix the problem you are going to start looking at other things like a partially restricted radiator, fins clogged with debrie, or worse possible seeping head gasket that compression gas gets into the system ONLY when the motor is hot.
Does this motor warm up quick? like in 2 minutes or less? Mine is like 45 seconds for outside temp to 180F, It's all aluminum 482 with everything done to control temps. Lets stay with the basic first. Thermostat, burp system couple of times, same for heater if car runs one. See what happens. Getting a new fan switch wouldn't hurt with it beening 14 years old. Rick L. Ps I like Glens idea with asprin, couldn't hurt.