Do I understand this correctly? You have malfuncioning axels, a thermostat that is stuck open, a coolant leak, and whatever else is not funcioning properly, and you were pushing 100+ mph on a dead end road? Ah to be young again.
Check your carpeting below the dash for a wet spot that smells like anti-freeze. If you do not find any there, then look up under the dash for any green fluid. I sounds like you have a leaking heater core.
Next, check your axal boots for any rips, tears, splits, or holes. There is no way you should be throwing sparks while you are running. If you were you have a very serious malfunction that needs to be corrected ASAP.
If you are going to do this kind of racing, with your car in the condition that it is in, then put your name and phone number on three pieces of paper.
Put one piece in your shoe, one in your wallet, and one in your shirt pocket. This makes it much easier for the emergency medical people to identify the body! rangerj