overheating

[dedjr67]

I have been working on a customers truck for a week now trying to solve an overheating problem, Have not been able to do so hopefully someone here has some advice.

The truck is a 65 with a stock fuel injected 350 from a 92 camaro electric fan that is turned on with a toggole switch so basicly it is always on. The car runs nice and cool (185 to 190) with ac off (Vintage air genIV) but when the ac is on temp keeps going up. I have replaced the thermostat with a 180 degree one added a second fan as a pusher to come on with ac fluhed the engine and radiator nothing seems to work. Once the ac is turned off temp goes down to normal range. I have checked my pressures in the ac system they are good. SO ac system is not overcharged. Thank you in advance for any help you can offer I am going nuts trying to figure this one out.
Dennis