spring rates

I have yet to see an A-body with factory leaves that wasn't all saggy ( in a yard). keep in mine the ones in the yards have no gas in the tanks and probably no spare tire either, or they are sooo rusted out that the back end is a lot lighter than it used to be. :lol: Mine seem to be ok with absolutely nothing in the trunk but add a jack, tool box and a spare and watch the sparks fly...
ok, As I recall there were only 2 diff kinds of suspension available back then. STD and 5 leaf HD, Guys correct me if I'm wrong. These days you can call and have some custom arched and rated, so the only limit is your imagination.