Requesting cooling/radiator/fan help for a slant six

Thanks to all for the help so far. I've read every thread indicated, probably 50+ pages with lots of good info! As with anything, opinions vary...in the interest of science I'm going to give a shot to using my original radiator with the MB clutch fan and see what happens. If it's not enough cooling, I will re-install the Champion with the fixed blade and call it a day.