All, found the correct Viton o-rings for the fuel line quick disconnects on the supercharged Grand Prix. They are working fine so far, no leaks! Bought them at AutoZone, looks like O'Reily's also carries. Call ahead, may have to special order. Recommend also buying the mechanics pick set (dental like angled pick, very helpful with removal)
Dorman #800-013 (2 @ 5/16 & 3/8)
http://www.dormanproducts.com/p-30428-800-013.aspx

Good replacement "how to" is found in this forum on this link:
http://www.grandprixforums.net/injector_oring.php