Thank you for all the replies. I am looking for any version of GT. I know I can update an older one with a marquee, hard drive, board, and new overlay. I am also aware I may have to drill some new holes for the fly by and backspin.
I had one lined up for $150 (GT2K maybe) in working order. I had priced everything else out to about a total of $325 to complete it. I am looking for an 04 or 05 as an ending project.
Again, thank you for all the replies and I appreciate all the help!