[RocktimusPryme]

2nd only to general cobbling, which is a problem on all old cars, I think the biggest problems is almost all of the 60s/early 70s era cars are under radiated from a size perspective. Which is why cooling is often an issue.

Per Cold Case a first gen F-body "Big Block" radiator has core measurements of 16.85 x 23 for a total frontal area of 387.55.

By comparison your basic run of the mill 5.3 99-2012 Silverado radiator from Cold Case is 17.25 x34 for a total area of 586.5 inches. By percentage of change, that's 51%

Thats a giant difference. And its reflective of sizes available for most of those common 60s cars. We talk about all the fan solutions etc, but if you just have more cooling area its going to solve most of your problems. Unfortuately that's easier said than done.

I disagree that a big clutch fan is the best solution. And I say that as someone who runs that setup. A well engineered electric fan setup is better. There really isn't an argument. Most peoples cooling issues with old cars are at idle and that's where the electric shines because its not RPM dependant. Plus less parasitic loss ETC.

Now I do agree that if we were to graph this out, the big clutch fan would probably be the equilibrium point where ease/value meets an effectiveness line. So I would also recommend the setup to most people, but I don't think the statement that it is the best is correct.