There is a new great forum for getting "quality technical information" regarding any setup with the 3800 engine. I know it is old news to some of you.

www.3800tech.com

I don't know about a better place but it is pretty cool. Ido recommend people to check it out! They have a for sale section there.

Warrior,
Checked it out. Not a bad site. And I do like the "for sale" section. And I think you get better help here. The guys here send information, sites to go to for your troubles and even mail you discs and print outs when they think you need that "little extra" help. Don't see that on 3800's site.
I'll go there from time to time. But I'll hang around here.
http://img.photobucket.com/albums/v425/kustomkid54/1998PontiacGrandPrixGTP003.jpg

Lots of parts for sale here also PARTS FOR SALE (http://www.clubgp.com/newforum/tt.asp?appid=13)