The pre-assembled sub chassis for your bus. Two models to choose from 55-59 with that extra set of outriggers and 60-67 for the later models. The lower outriggers are included but not assembled, as there would be no way to mount the whole frame in position when we should had assembled them. You will have to weld them after positioning the frame. The most exciting on this pre-assembled sub frame is the price, this is really what we call “dirty” cheap.