Well, as it turns out the ball joints don't fit the spindles.
Last night I got the upper an lower control arms bolted in place, went to install the passengers side spindle and it wouldn't slip over either ball joint. I guess the drop spindles use 71-72 ball joints instead of 63-70, which is what I bought. I happened to have a set of 71-72 upper ball joints, but I had to order lower ball joints. Since the parts store was closed when I realized this I wasn't able to go much further. I'll pick them up this afternoon and get them in this evening.