Not much at all now that Edelbrock just made a carb manifold for it I am eyeing up an LS6 for my 2001 as we speak!!!!!
http://ls1tech.com/forums/forumdisplay.php?f=28 has quite a few people that have done the swap and alot of info if ya wanna dig. Sounds like a fun project imo, was hoping to do it myself to a Fox some day.
ls1tech is actually a very nice website.
Im sure, someone there could help.
In the tech sections there are some serious brains posting. Those guys really know their ****, havent found a better website anywhere.
Won't work.