Mark,
Henderson's Line-Up in Grants Pass Oregon is a Bilstein and Koni dealer as well as an installer if you need them installed. They are very familiar with the suspension on all Beaver coaches as well as being a BAC sponsor, so if you are in that area, I would give them a call.
To straighten your steering wheel, you need to remove the drag link from the pitman arm and loosen the clamp to rotate the end of the link to lengthen or shorten it as necessary to straighten the steering wheel. If this seems above your skill level, any decent alignment shop can do it as this is normally part of an alignment, or if you have Henderson's Line-Up install your shocks, they can do it for you. Straightening the steering wheel in this manner does not change the suspension alignment in any way.
Gerald