Yeah, I don't think the taurus fan won't fit there unless you make it a pusher. I've got a little more clearance than that, and couldn't fit mine. Of course, my entire front clip is showed backward due to so many rock impacts.
The fan can run both ways, although I don't think its as efficient in reverse, not a huge deal, though.
For controls, at least in normal direction, I'd get a universal fan control setup with a little temp probe, and use that to control the low speed. Then a manual switch with a ~75 amp relay for the high side. You can get bosch 75 amp relays for a reasonable price. I'd carry spare relays for the low speed, and components to hard wire it on, just in case.