What radiator for 64 360 barracuda?

64mopar said
What radiators fit well in the 64 barracuda with a 360?

in my oem 64 dart 273-2bbl, 4spd, I just used the oem 273 rad when I swapped in a mildly hopped 70 340. It wasn't a problem with 3.91 gears but became a bit of an issue when I went to 4.10 or 4.30's ( I can't remember which, now)