Mech fan suggestions…..

I assume your rad is aluminum.
By any chance do you have a copper / brass in good (CLEAN TUBES) you could swap for testing?

Seems like some Al rads are pushed to the rear of the car by core thickness and mounting brakets.

Stock copper/brass can be 3 row with the extra row to the front.

You could open up the 22 inch rad support to accept a 26 in rad.

You could add high CFM pusher electric fans

High flow thrmostat, propper ratio pulleys, high flow water pump.

In all reality 200 to 210 is not all that hot.

220 is starting to push things.

Recently in another post i posted some radiator design info and they were talking that fins per inch was the most inportant aspect to a rad because ALL of the heat transfer from the tubes takes place at the point where the fin is soldered to the tube.

Good luck