The fan switch is located in the intake----directly opposite of the temp gage sender.
If the fan switch is working correctly----then the 1,3,5,7 side is running much hotter (15-20*) than the 2,4,6,8 side.
Guess I could swap the sensors around and check for that.
Not gonna do it today tho
not too worried about an overheat at all, runs around 200-205 on the hiway, and that is acceptable to me----(probably could use a bit more timing tho)