I purchased a 2" lowering shacle kit from AIM industries and I can't see how its going to fit, they say that it fits the rear springs that ford used that have the flex-o-matic type sustem AND they say it fits the regular system too, I have already caught them in 2 lies and they say that EVERYBODY there is 25 yrs. old or younger so nobody knows what im talking about.... but they know they fit..... has anybody done a 2" shackle drop ??? if so what did you use as far as parts go ?