Took this down to Phillip Island for the Australia day weekend and gave it the first long ish drive test. It drove pretty nicely and was fairly comfortable, though reinforced that it needed a better wheel alignment as it required a decent amount of pedaling over any decent bumps. On the way home it was mid 30's so and the truck was performing nicely till I got off the freeway at Officer for lunch. As it hit traffic it got a bit warm but just below hot. I stopped a few times to try and cool it down which didn't do a lot, though it didn't get any hotter and managed to make it home in one piece.
To tackle this I started simple, a bit more driving found it struggled more heat wise in traffic than when moving. So I started simple I'd only ever topped up and not flushed the cooling system, so drained, flushed and refilled the cooling system and added a new high flow thermostat. Cleaned up the existing bolts and housing as best as I could. The real culprit I believe was the fan clutch, wasn't 100% sure on this but ordered a new Davies Craig unit and fitted it up too The fan appeared to be working, but once having the two side by side I could tell the difference between the resistance on the new vs old. Once installed too I can actually hear the fan pushing air whereas I couldn't before. Haven't had a chance to test it properly yet but should get a run this weekend to see how it goes.
Woolomai Beach
33 year old corroded thermostat housing and bolts
Wire wheel restoration on said components
High flow thermostat and gasket, part number references for anyone looking up F150 things on a Commodore forum.....
New vs old fan flutches