I used the redline thermostat bypass and pulled 20 degrees or more out of the coolant temps. Now instead of creeping up on long rides to 215 or more. my second fan kicks on and off and keeps me below 200.
I run this with a larger pulley. 3 seasons zero issues so far. I have the f-body belt line.
https://www.mechman.com/240-amp-high-output-gm-truck-suv-alternator-w-4-pin-oval-plug/