The problem with squarebodies and trailing arms is the shape of the frame and the cab floor. The stock style trailing arm crossmember wont really fit well. You' d need to build some type of brackets like pictured and modify the crossmember to make it work. From your plans an I what I saw in the "homer" build I doubt it would be a problem for you. You might be better off adapting the cab to fit a trailing arm frame though. You can click the trailing arm conversion link in my signature if you want to see other pictures. I wound up having to modify this crossmember anyways....
