i have a 99, build date about 12/18/98 +/-
there are differences in the front brake rotors, i need to find the email that had the exact info, but the post mar/99 they are a little bit bigger. i just ordered new rotors, and learned about this.
the front track bar after mar/99 has bigger bolts, and is a beefier bar
when i put on a procomp front lift, they gave me the skyjacker bracket for the diff, to use with the oem bar. i didn't like the angles, i got a post mar/99 bar, got the procomp bracket that replaces the oem bracket, and reamed out the bracket on the diff. my track bar and tie rod are perfectly in line now.
the powerstroke guru at mountain states ford, in denver, looked at mine, said one other big upgrade was the intake, went from round, drawing from the left fenderwell, to the rectangular, drawing from the front.
i bought mine new, drove it away new, it has the door badges.
