When I had a 79 loaf with engine mods, I mounted the sending
unit"ring" on the #3 exhaust stud and figured I'd rather have it read
high than low.  The added benefit I go was that there was
instantaneous change in the gauge when climbing hills and running
down hills.  Other sending unit locations were nowhere near as
reactive.  Highest I ever measured there was 450 degrees F and that
was a 7 mile 7% grade with 2 big canoes on top in the middle of July
in Southeast Tennessee.

Remember, that Gene Berg said(before he passed on) if your pyrometer
cost less than $900, it wasn't accurate enough.

DM&FS

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