Ok, so the front is done, just need to button it up a little.. So, Ive done a shackle reversal in the rear.. I need to get about 4 inches more lift out of it.. With out buying brand new springs (read $$$) or going with blocks, what are my options?? F-350 springs?? Ill only get about 2-3inches at most out of them right?? I dont really want to go with longer shackles, cause that'll screw my pinion angle all to hell.. Any opinions?? Springs out of something else maybe?? Lemme know..