well I have a cut up 20v harness, so I have all the plugs you will need. Really its difficulty level really resides on how far you want to get into this.
WHat I was going to do was run the stock 4ac harness for the charging and the distributer and all that jazz. All I was going to do was wire in an EFI switch into the fuse block, and run a simple fuel only wiring harness seperate to the ITBs and the Needed sensors snd then to a fuel only computer.
Here is a website discussing fuel only computers and the different options. This arnt all the options either.
http://autospeed.com/cms/title_Progr...5/article.html