318 Bored .60 over...possible overheating?

Mine is good expect for mid summer heat, which in mid 80's up here, lol

I found it cools off better with NO T-Stat. I run a 180 most of the time but come May to Oct I just remove the thing and motor runs around 170-180 if its 70 degrees or better outside.

I heard the old the water runs too fast to cool off with no T-Stat but real world it seems to help and costs NOTHING...more $ for gas money, lol