Overheating 360 new engine

Dana67Dart said
More like 50 % or more.

Maybe it is time to dump all the fancy stuff, get a stock or stock style copper brass HP/ AC radiator, the appropriat pulleys, fan and fan shroud.

Or maybe you are chasing a ghost and the engine is just not broken in yet.

A 17" tall by 25" wide radiator is 425 Sq Inch. 50% is 212.5 Sq Inch.

A factory 17 inch fan shroud opening is 227 Sq Inch so a little less than 50% blocked.

The two 12 inch electric fans are about 226.19 Sq Inch so still a bit less than 50%.

Not enough to piss and moan about.