There was some debate on the forum months ago on where the
oil temp probe should be located to give the most "accurate" reading... don't recall what the recommendation was - sorry.
But I had mine located in a block that I spliced in the lines between the old filter location and a remote filter, (just a piece of aluminum that was drilled through at the same inside diameter as my hose, and then tapped for the lines and the sending unit).
Later, during some other project on the car, the sending unit was relocated to a bung which was welded onto the back of the
oil pan. The new location was a lot cleaner looking, but the temperature of the
oil was 30 degrees cooler as indicated.
- Dan