Really not hurting anything at 200*. My filled 511 would run 218* going down the road and it never hurt anything. I was using Evans coolant and a good oil (Amsoil) at the time. Had Milodon HV water pump and twin electric spal fans. If I stopped, the temp would pull right back down to the 200 range. I removed the electric fans and reinstalled flex fan with shroud and temps would stay in the + or - 200 range depending on air temp. I reinstalled bigger electric spal fans for this next season. Will see how it goes. Yeah, 200* I wouldn't worry about. Put some Evans waterless coolant in there and no worry about boil over til 374* or in our world, never.