Overheating 360 new engine

Slappy, try mounting the fans right on the radiator with out the shroud. You have a big radiator. You have enough airflow. You should have enough coolant flow.

I am still thinking there is an issue inside the engine and not in the cooling system. Something in the combo is wrong.

Bearings too tight?

Core shift and overbore is too close to water jacket?

Something causing cylinders 2,3,5 and 7 to run much hotter.