I replaced my T-stat but instead of replacing with 180 I replaced with 170 because that's what the store had. I was told it was an alternate temp T-stat availiable for the V8. The 10 degree difference does not reflect on the gauge so probably it should be fine?
Will that reak havok with the AUTO setting on the AC system?
I assume that the temperature in the AC system is regulated with engine heat.
Just a thought.