Help cooling 408 stroker

I have a 69 Dart with a 408 stoker currently have a 22 inch Champion 4 row radiator and a 16 inch stage 2 Champion cooling Fan 2200 CFM. Car still runs hot and need some advice what I can do for more cooling. I only have little more then 2 and a half inches from radiator to pulley. What are my options?

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