Anybody know the spring rates of 63" chevy springs and the 57" ford springs that are 3" wide? I would like to put one of these two springs under my 2nd gen 4runner. I would prefer to go with the ford springs because they're shorter, but my 4runner is pretty heavy. So, anybody know the rates off the top of their head or where I could find it? I searched around but couldn't find it.

This should help ya
http://www.therangerstation.com/tech_library/leafspringrate.htm

This should help ya
http://www.therangerstation.com/tech_library/leafspringrate.htm

That calculator is pretty sweet, thanks for the help! Unfortunately I don't have either of the springs, so I can't get all those measurements. :( I could find 'em at a junk yard and get the measurements though. I think I'm just going to have to pick one and roll with it, and if I don't like it I'll change it.