It's an interesting puzzle, I've done it about five times. It takes the right rotation of the OEM bolts to get the welded on washer in the right spot, to let the washer get past the lines etc. My first truck I did was in 2004, my 98 Mercury, and I had to get the emissions line un-clamped or however that is, to get space to do it. The next time I figured out how to move the UCA and bolts/washers, just so, and not have to move the emission line. I haven't had to the last three times either.
It just takes a few minutes to get the bolts out, once you know first that it will come apart, and then be patient enough to keep changing the orientation of the bolts and the UCA etc. It is like a puzzle that you can work well, once you've done it. Keep at it, go slow, it's not a high force issue, it takes a little bit of force to finally get the bolt/washer to clear.