OK, spent the day reading internet sources and a book by Herb Adams. I found that the pinion angle does change with ladder bars, but also with unequal length 4-links as well (like you said). Although I did not read anything about binding, could you possibly elaborate a little for me? From what I read, the adjustability of the 4-link is very useful, but it also takes a great deal of knowledge, along with being more expensive to maintain in the long run.

If we were to go with 4-link, would you suggest a parallel set-up with a Panhard bar or a triangulated set-up?