That b**** is beat all to hell... lol but parts are parts, and it'll have a pretty good chunk of what you would need.
You could use quite a bit from it, but you would still need 97-03 L67 return style fuel rails. 04+ are return-less style. You might need to modify the alternator bracket as well, a TB adapter, and a few other things.
You're gonna need a way to tune it as well, and supporting mods.
I'd say it's a pretty good deal, IF you know how to work on a GP. Most would spend more than that for a complete top swap.