I have a 1997 camaro LT1 (5.7) and the engine tempreture is running at 220 to 230. This just started happening when I got the radiator replaced. The mechanic says this is ok but that seems to hot. What temp should the car run at? The car also has a 180 degree thermistate just so you now?

Optional Information:
1997 Chevrolet camaro LT1

Already Tried:
nothing