FWIW: On my '77 I have two temp senders and gauges. One is the OEM temp sender & gauge and the other a Sniper temp sender in the block drain. My OEM gauge sits about the first tick-mark, and that is about 185 - 188 on the Sniper read-out. Evey once in a while after driving in the heat, then...
That is my wife's cousin's truck, and is not your run-of-the-mill 3600. It has a Cummins 12-valve in it. It's just one of many old trucks he has.
Now the tan Chevy G30 4x4 van is his son's slow ride to the marina.
I have the dimensions of the bracket, and even bent one. However, the metal I bent wasn't thick enough and I don't have a press to deal with thicker steel. I plan to try and weld a stiffener on it, but haven't messed with it yet.
Yeah, 160KMH, really???......not in mine. I may have had it close to 140KMH once, chasing the infamous @POTATO LAUNCHER & Texas Gang across New Mexico. But that was for a short distance.
Now, I have sustained 70/75MPH (120KMH) for 3 to 4 hours on the flat lands, no problem.
Brother, if you were close by, I'd more than be happy to let you take my 40 out for a spin to see for yourself. The power performance is very noticeable right off the bat.
Was it worth it? To me it was. I drive mine most days and it performs similar to my Tacoma. Summer time hot starts...