The mods get mad about talking about selling harness work so I will refrain from selling anything. There are a ton of resources on the net depending on what year harness/ ECM you use. If you are going to use a truck harness/ ECM/ truck intake you will have to dig up the info, but its all over and very similiar to the car stuff. A great start for car harness info is:
http://www.ls1tech.com/forums/conver...swap-faqs.html
I used carshopinc motor mounts which are around 50 bucks, then I only modified my mounts for clearance of the stock manifolds. There seem to be a handful of different frame mounts in these trucks so you will just have to buy the plates first and figure out how it will go together. I know on this truck Im doing they lined up pretty bad but I made it all work, once its all bolted together tight its fine, just kinda fun getting everything in line.
For the fuel system you cant beat the external 255 walbro and corvette filter/ regulator setup, very easy to do. Ill post some pics of mine later.