Three chassis/alignment shops seemed to be mentioned the most on the forums.
East coast = Josam's
Southwest coast = Colton Trucks (Where I had a great alignment completed.)
Northwest coast = Kaiser Brake & Alignment
I'm sure there are many other competent chassis/alignment shops, but these are there three I recall reading about over and over again...
Twinboat - I hope the trip goes well for you. I'll share that I friend with an holder F450 based LazyDaze went to a shop and asked them to go slightly over the spec for toe in, so it would track better. He said both the shop service manager and tech doing the work, came to talk to him. Said they'd do as he asked, but recommend they use the stock settings, check out all of the suspension for any wear items. And then he should go use it for awhile and see what he felt about it. If he did not like the way it tracked, handled, they'd reset the toe in as he asked (But, that he would have to initial he authorized non spec settings.). He followed their suggestion - and was pleased with the ride. Said he was grateful they talked to him, and that the tech was specifically diplomatic with a comment about 'Old School' for older chassis - does not work the same on newer chassis.' (Or wording like that...). Buy the way, they also suggested that he come back in after about 15-20K more miles, as a few wear items would probably need attention at that time. (He asked them if they should be changed out now, and they both answered no need to do so now, save the money, and do it when it was needed.) This was a smaller chassis shop in San Diego, Clarence Brown.
I only mention this, because his I believe it was 2011 year F450 (he bought he Lazy Daze used.) - is running and handling fine for him.
Hope you have the same experience
! Best,
Smitty