The stock MJ Pitman arm drops about an inch. The ZJ arm drops about 2". Your arm drops 4" it sounds like, 3" over stock? If your wheels are centered in the wheelwell, the parallel geometry is more important the equal lengths of the track bar and draglink. I would change that Pitman arm out with a ZJ arm, or re-use the stock MJ arm, whichever one makes the track bar and draglink most parallel. BTW, are you experiencing any bumpsteer now? If you mentioned it, I must have missed it.