Requesting cooling/radiator/fan help for a slant six

AJ/FormS said
That test is biased to a situation that barely exists. How often will your engine be spinning at redline?

That's only one of several basic flaws in this "test". See here (especially 3rd paragraph and beyond) and this other thread starting here.

And how many of us are running direct drive fans?

Most of us with early A-bodies with Slant-6 engines.

And how often will you be running it up to 100mph?

How else am I spozeda get the kids to school on time?

Or, on a slanty which barely makes any heat in the first place

They make plenty enough heat to overheat in a hurry if the radiator, fan, thermostat, and rest of the cooling system are inappropriately specified or in poor condition.