We used th400 GTO ones also when we raced the ls-5.They worked with the right u-joints.I cannot remember the combination on the joints, front was fine I think back had to be the one that was not symetrical to fit the 454 rear flange. Too long ago.
Putting them on the shelves is the problem Rick. They must be kept under your bed or in a warm closet. You have seen this one before. I'm keeping it rust free for you
http://i65.photobucket.com/albums/h2...s/100_4215.jpg