2002 single cab leveling question

[kennyhammond]

Bought this truck as a work truck ... 2002 single cab stepside no level of anything and it say about 3 inch difference from front to back ...installed a set of leveling lift keys and then tightend all the way it's is an 1 inch difference now ... Is that normal or am I off on something .. Only thing I do know is driver side bushing on cross member for torsion bars is bent ...rear leaf work he looks to have a block but don't know if it is stock or after market ...will get a picture soon ..planning to run 305/55r20. Have 305/50r20 it's what's came with the truck when I bought it