I found a winning combo. I had to use a fan clutch for a newer Dodge Ram pickup and the 7 blade fan as listed in the previous mech fan upgrade thread. The fan clutch had a mounting nut that was about 2" to 2 1/2" long. This got the fan away from the motor and about 2" from the radiator. The only tricky thing was that the longer fan clutch made me have to slide the shroud, clutch, and fan in all at the same time but it wasn't a big deal. Works great so far and moves a lot of air.
TorquFlo Fan Clutch #922511
7 Blade Fan Mopar #55037650AA