which napa did you go to. i use to go to the main warehouse and always had douche bags serve me. i started going to napa on 61 ave and 36 st SE, behind staples. there is an older dude there with a white beard. he always found what i needed and always got me the correct parts.
when i was in the main napa I asked for a special balljoint socket for the D44's they said no special tool exists of such sort and that i would have to go through ford. so after finding out about this other napa store, i went there and 5min later the guy had the right part number for me and said they have 5 in stock at the main napa store. you should have seen the embarrassed look on the guys face when I went back to the main store and gave him a napa part number. since then ive gone there all the time with no fail yet.
NAPA parts are way overpriced, I go there if I cant find the part elsewhere.