Switching to Manual Steering

Back again with another amateur mechanic question...

I had the bolts for the steering box a bit more than finger-tight until I got everything lined up...After figuring out the issue with the adapter (yes, I had to move the column ~2mm) and got the pins inserted, I went to tighten the three bolts that hold the box to the K-Member...and while two go in fine, the one on the outside (the side with one bolt) I've got a problemo. I'm afraid that I might be about to cross-thread it!

The bolt threads in fine about 1/3 of the way and it starts to get tight. I have no idea how this could happen...the bolt looks fine, I cleaned some grime out of the threads which made no difference.

What do you guys do in this situation? It's a really inaccessible spot...I don't have access to a borescope and I'm floundering around under jackstands that aren't nearly tall enough to be comfortable.

Advice welcome. :D

Otherwise, she's ready to go...