"Almost all new cars use an electric setup these days and you know the manufacturers don't do something unless there's some benefit to it (although the benefit is sometimes due to packaging issues.)"
Seems like there should be some new cars you could get an elec fan setup off that would be pretty powerful and factory reliable and apparently fairly economical if a person was into the electric fans. I wonder if they would be sufficiently powerful enough for a big block..
"Hey how about a thermostatically controlled hydraulically operated fan?"
Such as a hydraulic pump and a radiator fan run by a hydraulic motor? Think those are on some big diesel generators or some such. I believe I saw one when I was a kid. Sounds quite cumbersome for a car app I speculate :).
