Thermostat, I could have put that in wrong, I can't remember, so I'll check that out.
Vikki, here are your answers: 1) Sunpro guage using the thermo sending unit it came with. It seems to be accurate given the rate it increased as the tempeture changed. Also, since I heard the liguids boiling in the engine, I'm assuning the 250 temp was correct. 2) I'll check it out. 3) I can't remeber what the impellers were, but I do remeber looking at the clearnece and thinking it was close. But to be sure I could take another look. 4) Th radiator is the original one and worked well when I pulled it out of the car years ago. It could have restrictions due to age though, so I can have that checked.
Sheri, acutally what I meant was that the fliud level was unchanged. I filled it to 3 inches below the cap and the level didn't seem lower much after it heated up.
I'll get back to the car in a few days, so I'll try the thermostat, check the oil for foam, and squeezing the upper hose, and go from there.