engine temp has more to do with the setup than the particular engine - the first thing to try is a check in the rad with a good thermometer [don't let yer wife find out] to see how the gauge relates to reality .... next is to check the distance of the fan from the rad - you don't say what the engine is in .... have a shroud?
I wouldn't say there's a real problem at 200 until you've analyzed your installation, it'd be a cold day when a small block stays at 180
Bill
