there's no "kits" yet for that engine. there is however, a M90 kit for the 01+ SOHC 4.0's. 02oregonedge has one. R.P. Caster is the kit.
You'll need to make a egr bypass/extention. a new intake manifold out of aluminum. figure out your maf and throttle bodys. take a peek at RangerPowerSports.com for a huge section of people with boosted rides.