Took my 84 down to the local mechanic and he told me 225 with AC on is normal for my vette. I would think if I bought the car brand new in 84' it would not be running anywhere near 225 but would be locked in at 190 like all new cars. I have replaced the stock radiator with a new one and am now looking at the condensor possibly being dirty stopping the air flow. It has a single electric fan but it runs strong and has good flow. Any ideas would be of great help.
Thanks,
Mark
PS I have not replaced the thermastat yet as it looks to be opening fine at about 187.