New fan might have been a less stressful resolution. Plus that's 24 year old, many times heat cycled plastic. I think there's even a higher CFM fan that was used for the trucks that were supercharged?
Yes. Yes, it would. I haven't even broken that nut free and certainly doesn't look like the fan will just "lift off" even if that nut isn't there.
Do you have a part number for the higher CFM fan, did a little searching but kept getting the clutch?