OK, I replaced two thermostats, both in 1995 V6 cars. I think that they were original, as they were alike. Both were stamped 180. I bought the first replacement at the Ford dealer, a Motorcraft RT-1104. Was Identical to the original, with a "STC" on the flange, and the copper button with a 180. Paid over $11. Bought the second from Advance Auto, a Stant 14138. Was identical to the one in the Ford box, "STC" and 180. Cost was something over five dollars... :rolleyes: gotta love it. Both cars have the temp gage reading the same, around the O and R. I think it was the same with the original units. The associate at Advance said a 180 will be fully open between 188 and 190. Sounds good.
Al
