I finally got my cooling temps down after installing a modified blue fan clutch. My journey Started 2 years ago with a radiator, new unmodified blue clutch, and thermostat, then a new fan, belts and modified blue clutch from wits end last month. Initially tried to modify the two year old blue clutch but the Phillip head broke off when removing, either way it was way out of spec from what others posted for operating temps. So decided to get one from wits end with all the cooling hoses. Ran great and cool in the Southern California desert until crossing deep water. The new fan must have had too much resistance and was pulled into the radiator catastrophically. This did not happen to 5 other 80's in the group. The fan may have also contributed since it was a bit more flexible than the old one, which was yellow and brittle when removed, I could break it with a bit a force. The new and old fans seemed identical in castings size etc. but the new one was not a Toyota but made by Aisin. I'm not sure what contributed more the modified blue fan clutch or the Aisin fan. Lesson learned, a new fan and modified fan clutch cannot move water, water wins.