I really apreciate it, if anyone has a second opinion id be glad too see it. i realize this is a stupid question for me to ask, of all things to know i should know the year.
Realistically, as long as it was 98+ it would be pretty easy to upgrade. If you put a 2k+ backblock on a pre 2K cocker, it then takes 2K+ bolts. The valve never changed dimensions until the trilogy & 05 Black Magic valves. 98+ has the threaded IVG. Pneumatics are compatible as far back as cockers go. The only thing that have a 98-2000 that would be an issue is if you wanted to change front blocks, or put a pump kit on.