The fan will have to be cut down to fit between the radiator and engine.
Upgraded alternator is not a bad idea.
I have been running a Taurus fan for a number of years just hooked up to a relay, fuse and toggle switch.
I run it all the time.
I have been looking at this kit, and probably will install it this winter, it will start your fan on low and step up as the engine requires more cooling.
It also has a option for the fan to turn on all the time when the air conditioning is running.
I think with this kit you may not have to upgrade the alternator.
93 YJ SOA 2" springs front, XJ springs rear w/main leaf added, High pinon 9 inch rear detroit locker front Dana 44 ARB 4.56 Gears, 36 inch Irok tires too much to list. www.mijc.org