97lincoln towncar running hot blowing white smoke

Your vehicle is 27 years old. It's entirely impossible to guess what is going on without hands on inspection. The only thing I can tell you is that 25 years ago there was an extended warranty coverage on the intake manifold, which is made of a composite material and would crack in the area of the thermostat sometimes. If this happened you could have overheating occur. I would have a look here first. Beyond - and including - that, hands-on inspection by a trained technician is required. https://repairpal.com/auto-repair-near-me