67 318 running temps in the summer

Donate the elec fan to the closest rubbish tip........
It is blocking air flow on the freeway.
Use a factory clutch fan & shroud.
Do NOT remove the stat. It creates pressure in the engine to reduce localised boiling.
Water pump should be 10-20% overdriven, ie pump pulley should be 10-20% smaller than the crank pulley.
More info here: www.stewartcomponents.com