I had one years ago with no fan clutch and a similar fan. It was loud and hurt my fuel economy. I put a stock unit on and liked it much better. Otherwise it did work.
Nice truck, fun project and parts on hand. Uh, you DO have a problem by the way. I know because I have the same problem. ;)
Your brake upgrade is a good idea. Add a dual diaphragm booster from a 2nd gen truck with the 3.0 for a noticeable improvement.