So I have read about every thermostat thread on here and I see mixed results. Some say and the guide recommends a 180 while others state the stock 195 is fine. Regardless of temperature tuning for it is important which I am doing.

I am a top swap, VS cam, headers, and soon to be E85. I have a dyno tune coming up in several weeks to tune and find the best pulley size. My tuner recommends a 180 but is it necessary? Will it allow me more timing, smaller pulley, or less risk of knock? I run a 195 because I like the heat output in winter. My experiences with a 180 in the past with other vehicles the heater difference is noticeable. I don't like a crappy heater in the winter on a dd with two young kids.

(I am also doing a fuel pump rewire, 60 Injectors, and AEM pump)