whatever you do, make sure you practice, practice, practice before even thinking about shooting your truck. buy some junkyard fenders and do those first.
there are various sites that sell KeyParts products. run a google search for "KeyParts Comanche rockers" and I imagine that same site will carry the tails.
that image shows an MTS assembly. just get their 4.0L one and you'll know for sure.
on a side note for anyone else reading this, the 2.8 never had a pump in the tank, but rather a mechanical pump on the engine that sucked through a suuuuper long straw.