360 Over heating

I had an overheating issue That baffled me. It ended up being the aluminum radiator . It was a large Be-cool I thought was clogged. Had it acid cleaned and flushed. Flowed water great.

Ended up being air flow. That radiator at some time either frooze or was over pressured from Head gasket letting go under boost. The tubes were no longer oval they were round. You could not see light through the radiator at all. So it wasn't flowing air.