Cant keep the car cool HELP

I couldn't make a flex fan work either.
Not with a shroud plus Hi-flow pump, plus hi-flo stat, plus a 26 inch A/C rad.I tried some other fans, but
Problems disappeared with an all steel oem 7-blade fan on a Ford thermostatic clutch.
Now I run a 205stat and a 7pound cap, 50/50 and no waterwetter.
I'm at 430hp or so. Maybe a tad more