Mine ran hot till I moved the sending unit to the thermostat housing. Now it stays right the thermostat temp. which is 190.
If the sender is in the head between #1 and #2 cylinders, it will read high. 200 is OK as long as you are not loosing coolant. Add a small overflow just to see if or how much you may be leaking.
FYI, I am using a aliminum radiator from Afco in my truck. The stock one did the job ok, I just got tired of fixing the tank seems. The aliminum was almost a bolt in other then rerouting the lower hose and moving the brackets for my application.
Joe
