Does anyone have to ohms settings for a stock guage in 56 3200 235 for the water temp guage? The Car quest unit they gave me has 100 deg. - 441.6 ohms 220 deg. - 88.79 ohms. This sending unit it supposed to be for stock. It has 1/2" npt tap and I have 53 heads with 3/8" npt tap. Trying to find a replacement sending unit but need to know if these ohms are accurate for the stock guage.