still runnin hot, cant figure it out

[jetfixr]

I posted a while back about my 70 c10 running hot. There was a bunch of input, and it gave me a bunch of troubleshooting tips. After a couple of weeks of messing with it, I am back again. Since then i have installed an electric fan (jeep mod) and put in a 165 degree thermostat. Today is an mild 85 degree day, I took the truck out to do some more troubleshooting. Ran it at highspeed, no grades for 10-15 min and it was running a tad over 200. Turned down a rural road with few stop signs , running about 40-45 at about 2000 rpms for about 10 min and it dropped to 190. I pulled into a parking lot, let it idle for 15 minutes and it sat at about 175. For troubleshooting i have the fan wired constantly hot. I checked to make sure the lower radiator hose wasnt collapsing, the timing is right, the temp gauge checks within a few degree of an infrared laser thermometer. The radiator is a new 3 row and should have no prob keeping up on a mild day. I am starting to question the water pump, but dont they usually leak or make noise if they are going bad?
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