Sway bar end link is a good possibility. My left front tire leaned inward at the top. I changed out the sway bar end link with a new moog one (did both sides at the same time) and it fixed the problem...tire is straight.
I don't know what the specs are, I haven't changed anything since I bought it. I'm thinking it was never aligned after the drop.
I just replaced both the front swaybar links with Ford parts... I'm wondering if I didn't break one again. Does lowering put more stress on them? May be a good excuse for me to upgrade to the greasable Moogs.