I'm not sure how the flex-a-lite fan controller works so I can't comment on it. The Imperial switch is more or less a temperature activated switch. YOu should be able to run a hot lead to and from it with no problem. The trigger doesn't use any appreciable amperage.
My replacement radiator has the shroud mounting flanges too. They have a long stand off since it originally came off a C-body. The radiator I was using had the mounts removed years ago. I hope it doesn't move the fan too far out. If it does, the pulley won't be a problem. Instead, it will put the plastic fan shroud against the turbo downpipe. Can we say MELT boys and girls? Maybe I can slide it under the shroud flanges like you did. If so, I'll drop some clip nuts on the shroud and drill matching holes through the shroud flanges.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
