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I was following some of your suggestions and and I think I may of spotted something. The top of the fan blade has a 2ish inch gap from the blade to the top of the fan shroud. The bottom blades have maybe a 1/4 inch from hitting the shroud. I played with the shroud and it doesn’t seem adjustable up and down. I can adjust it left and right. The shrouds part number cross referenced to a c10 NON AC truck. My truck has ac . I don’t know if the shroud holes are different on an ac truck. I also. Noticed that the fan blades are about 3 1/2 to 4 inches wide. The blades only stick in the shroud maybe 1/2 inch. I don’t know if I can get a spacer to push the fan out an inch or so. Or if getting an ac speced shroud would solve that.
Also to answer some earlier questions. I do have an over flow tank. And the water pump pulley is roughly 6 inches in diameter. Would an over drive pulley help? Or do I already have one?
Yesterday when I was filing in my driveway the truck crept up to 200 and I started driving and it went down to 175 -180 when I came back and idled again it crept up to 225 ish and then started to idle real bad so I shut it off before it overheated, the gauge is an aftermarket one. I did at one point borrow a laser temp gun to see the temp spread of the radiatior .