You can’t trust thermostat ratings

That's a known trick with the magum 5.9 computer controlled. they like the 180 stats. Only aluminum head **** likes 195, that's self explanatory really.

They SAY carburetor engines like 170-180 stats...since carburetors dont really like heat...vapor lock,heat soak...again kinda self explanatory .

No body ever asked me...but I have run a 165 high flow mr.gasket for 20 years.
That's apart of my ragged edge tunabilty angle with running a cranking compression of 185 on 91 crap. My truck has a 180 because of the cracking heads initially..but it runs better overall...and in reading over the years to follow..I found that echoed on many forums and websites selling power adder,chips ,intakes,exh.. etc..