Adjust the ride height per the procedure primem posted. Then see if the rear is still off.

 

Late to the party but, did you replace the shackles when you did the springs? I just replaced my shackles on my 03 with well over 200K miles and I went from a noticeable sag to about a 3-4" lift. I used Dorman direct fit shackles from Rock Auto. Might be worth a look either way.


My shackles were rotten and both broke on the way to the shop to fix it, lol.