Then your problem isn't with the fans 'cause it seems you have enough airflow through the radiator at low speeds, but your problem is insufficient airflow at high speeds.NickInTimeFilms wrote: My engine temperature most noticeably rises on the highway of all things. I can wheel it all day without issues
Insufficient coolant flow through the radiator could be one potential issue but insufficient airflow could be another. The latter could be due to something in front of the grille obstructing airflow such as auxiliary lights, a winch, or a clogged AC condenser. You may need to add an engine undertray (metal would be better so it can protect steering components and the oil pan) to create a pocket of negative pressure behind the radiator at speed and allow the fans to work more efficiently. Without it, air gets stacked up behind the radiator and doesn't allow airflow THROUGH the radiator.
An auxiliary tranny oil cooler would be an excellent idea to reduce heat transfer to the coolant.
SilverXJ wrote:That is from heating the rod during piston and rod assembly. You need to expand the pin bore in the rod.
That rod has been barbecued and definitely doesn't look normal. I don't remember my connecting rods looking like that after I had the pistons fitted for my stroker.