Is this standard height suspension

[Crate]

I am not familiar with that shock, someone else might be able to tell you. But if your radius arm bush's are not concentric (it could be wear) but is more likely that castor correction bushes have been put in like these:

http://www.roadrunneroffroad.com.au/...ndcruiser.html

Its probably a 2" lift, that little bit of rust on the springs I would not be concerned with, breaking springs is very uncommon.