93 Corvette overheating?

[Miss Demeanor Racing]

I have replaced the water pump, opti-spark, thermostat and cooling motor. It still overheats at 250-260! help!
No it does not overheat while idling

 

[John A]

Make sure the thermostat has an air bleed hole. Also, put the thermostat in a pot of boiling water and make sure it opens. (Replace it if it doesn't.) Does it overheat if you start it and let it idle for 10 minutes? If so, it's almost certainly the cooling system.

 

[Rooster 1972]

You really should take this car to a Chevrolet dealership and let them diagnose your problem. It should not take them long to find out what is causing your Vette to overheat.