I recently bought a 70 bronco and was wondering about the "bronco lean", which it has to the drivers side. The lean is about one inch. It has new wild horse coils and 11 leaf nationals, but the old or original c- bushings. Can these be the problem? The front springs measure the same but the rear drivers side leaf is lower than the other by an inch.
Any help would be appreciated.

It's a problem with the C-bush mounts. there is a write-up on how to cure it at
http://www.broncofix.com/ebe/Tech/tech.htm

I read it and have seen something simular. But it states front end lean and I have front and back lean. Figure that you have front lean the rear lean comes with that right. Well I am getting some new c bushings anyway so that should fix it too.
Thanks