[RichardJ]

I do understand what you guys are saying about not needing a pusher fan if everything is right with the engine to start with.

My poor old 292 came from the factory with a fixed 4-blade fan and no shroud. I wanted to keep it simple when I added the AC, so a '94 Cad pusher fan runs all the time with the AC. It has extra finger protection so it works perfectly behind the hood release.
The other fan came off an '89 Cad and is connected to 208* thermo switch on the thermostat housing and to my knowledge has never turned on.

I didn't want to give up the reliability of the fixed fan and this turned out to be fairly easy to install. Still no shrouds. When you have to start getting anal about the shrouds, you've got other problems.

Triple-digits in So Cal. AC is cold, engine at the top of the Cold range on the factory gauge.