I am interested in adjusting the wastegate on my '86 9000 but I have never messed with something like that before. Can somebody give me a few pointers on how to do this safely and effectively? Thanks

Try this (BillJ's site):

http://www.saab9000.com/procedures/exhaust/baseboostadj.html

Actually, I found that right after I posted the question - thanks though! :o