I pulled these off of a lowered '89 pick-em-up. I was told that the pack is softer than stock but it had a bigger overload on it to support towing duties. The only catch is that I pulled them off because I kinda bent a main leaf on one of the packs. Its not too bad and would be a great setup for a custom pack. I had these on my K5 without any problems, I am just moving to links now. You can give me a call at 707-344-4203, pick up only. I work in Martinez during the week but I live in Fairfield, I can meet you in either place. I am asking $80 for the pair.

http://i13.photobucket.com/albums/a251/PsychoticDeadGuy/6-25%20Wheelin/Wheelin016.jpg
http://i13.photobucket.com/albums/a251/PsychoticDeadGuy/6-25%20Wheelin/Wheelin015.jpg

These 63s vs. Stock 52s.
http://i13.photobucket.com/albums/a251/PsychoticDeadGuy/Rear%20Spring%20Swap/DSC01280.jpg
http://i13.photobucket.com/albums/a251/PsychoticDeadGuy/Rear%20Spring%20Swap/DSC01279.jpg