As soon as I moved to Florida from Ohio the first thing I did to my '86 was replace the thermostat with a 160. The only reason GM puts in a 195 is to heat up the engine quicker to fire off the cats. I do not like the small difference between 195 and 235 (danger zone). I would rather have that larger difference of 160 to 235. For some reason the 160 in my '86 is a true 160 (according to the guage) but when I replaced the 195 in my '03 with a 160 it reads 172 on the digital read out. Either way I gained peace of mind and that is one less thing to worry about. Plus it is about the easiest item on a Vette to replace! Some people say you should reprogram the fans but I never did. Good luck!
