My temp gauge always reads hot but my infrared temperature gun gives healthy temperatures at the radiator, hoses, and head. I was at a show recently and talked to another flathead owner who said he resolved the same issue by putting a 1/4 ohm resister in between the sensor and the gauge.
Anyone done this or have thoughts about it.
I'm running a 218 block with 12v and original 12v gauges in my '57 d100.
-steve