[gmc684x4]

The old guys i grew up around used to swap 180 in summer and 195 in winter I quickly realized it was better just to run the 195 year around insure water pump and rad where good with no leaks
Only once in 30 some years I had over heat issues on a hot day with a traffic jam for miles my 70 so 4x4 had no shroud and only an old 4 blade fan