We support many radiator and fan set ups. On an early JK when you purchase the PWM fan upgrade it includes a new Mopar fan module(or SS) and a HD harness that we build. The Pentstar and Camaro SS fans can draw 70 amps so the leads go directly to the battery with a fusible link, we run 8 gauge cables. Then we program your ECM to drive the fan and there are several options here.
The advantage to the Pentstar fan is it drops right in with no mods and runs our standard coolant bottle mount. The SS fan requires a little modding but not much, if you purchase our HD radiator we will fit it for you. Both the Pentstar and the Camaro SS fans run about 19" blades(vs 17" on a 3.8 JK) with an outrunner ESC motor design meaning they can pull a lot more air. I prefer the SS fan, it's a little quieter and may be a little more powerful.