Support frame under ribbed floor Bus 01/60-07/67Silver Weld Through (SWT) 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. A top quality part offering the best fit possible and finished in silver weld