I swapped in my 170 degree T Stat tonight. It went surprisingly well. Took about a half hour plus a half hour testing. Here is a picture of location. (Sorry, I didn't think of taking a picture until I was just about done!) Pulled the Typhoon tube out. Then used 8mm socket with short extension, 1/4" drive to remove the two bolts. Got my cup under it and wiggled it out. I filled the small cup three times. So I had one blue cup full and one small clear cup full after draining. Probably lost 2-3 ounces at most. So, say I drained about 20 ounces and lost 2 of them. Then used a small screw driver to break the stock T Stat free from the housing. Popped the new one in the engine with o-ring out and reversed the process. I snugged up each bolt and then tightened them up. I was a little concerned because the o-ring that came with the new TStat was thinner than the stock rubber washer but, after a good testing and a couple of checks, there are no drips. I drove around the block a few times, checked it, went out for a 5 mile run, checked it then did another 5 mile run with a couple WOTs and a good screeching launch (salt). Then a final check. It looks like the gauge is slightly lower than the dead center it used to be. No problem getting heat although it may have taken a bit longer the first time. No over heating. Here is a pic of the location of the housing and of the cups I used.
