I don't know how different the collars are, but I would think it should be fine. Another option is to take the bent stud to a local fastener/bolt shop and see if they can cut one to size for you. I've had varying results with fastener/bolt shops. Some are great, some are crap. I checked with our local dealer about your stud, and I found the same issue. No part number listed for the '77 model. I'd probably try the local bolt shop first. It'll most likely be cheaper and faster.