ok both leaf packs on my truck are feathered out to the side and are really worn...156000 miles on em with heavy loads a few times a year on long trips...would an add-a-leaf restrengthen my leaf packs?

 

AAL won't really do anything for strength. I it will lift it up. I would suggest super springs, I put them on my truck because the back sagged a little when loaded up and the work great. They are more then an AAL but I think they will accomplish what you are looking for. They only took me 45 min to install, and it is really easy. Anyone can do it.

Here is a link with more info. Click on the "two guy garage" for a video for more info
http://www.supersprings.com/