another 360/408 over heating

I realize I am old and "out of touch" with modern, but IF we could cool these cars with OEM parts decades ago then why is it people seem to think they need elecrtric fans now on these old cars???
I understand bore a motor out 60 thous, change cams, timing etc and that does make a difference, but...................
For me personally it's getting rid of the twirling blade of death. Now that I've had electric fans for a while I've gotten used to not having that big metal blade flying around when I'm playing around with my motor. and it's certainly not that electric fans can't do the job it's just things have to be configured properly..