I assume you're going to use a junk yard engine and not the engine from the 2003. What is your mechanical experience? Ever done anything like this before?
Where will you be doing the work? What does your tool box look like. Good set of tools or just a few basics? Swapping a V8 into a car that had a V8 engine
as an option shouldn't be that big a deal. Not to sure about the computer on a 95 though. There's probably a difference between the 6 and 8 cylinder models.
Sounds like a great project though. I say go for it. BTW why Sept 08? JUst a target date or does something happen then?