I have a 02 TJ 4.0L and did a fuel pump assembly replacement on mine, we both have the same procedure. It was actually very easy and I am one without much mechanical experience, only needed a few simple tools. Just MAKE SURE you get a "Strap Wrench" to twist and tighten the locking nut on top of the fuel pump. But when you tighten it, do NOT overtighten, it will crack the seal. Other than that like I said, easy.
PB blast the bolts a day or 2 before, and I had a helping hand to adjust the gas tank, this is pretty much a must,