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The 160 thing with the thermostat is because lower temps traditionally equal more power, but higher temps are better for emissions/govt compliance (hence the stock 220 tstat). This is totally true with Gen 1 smallblocks, but I've read that with Gen 3 and up it isn't much of a concern as these engines are designed to run at higher temps, which makes sense. More hp out of the stock tune n stuff.
As long as the fans are tuned to come on at the lower temperature, it shouldn't cause any problems. Heck I still think cooler = better.
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