best thing i found was when your about to put in the new shock compress it all the way and tie it down with a chain or something so it stays compressed. then fit it in correctly and remove the chain then the shock should uncompress back into the fittings. then just tigthen the bolts back and your good to go.
2001 dodge durango 4.7l 4x4 SLT-- Afe Cold air intake, borla exhaust. 2" t/s lift, bilstein HD shocks, hawk performance brakes, power slot slotted rotors, westin grille guard, Piaa plasma ion fog lights, hella 500 black magic lights, 32 inch goodyear wrangler duratracs, superchips performance tune.