[will slow gto]

Based on your photo, it looks like you may have ordered/were sent Ames S390 (64-67), whereas you would probably want S391 for 69-72 applications. The Ames catalog does not include a photo of S391 but what you have there is different from my original pieces. I've included a photo of my original pieces (the bushings are repos from OPGI). There's also a photo of assembly order, the mount flange goes inside and rests on the bottom of the frame rail. The rubber sandwiches the core support. If you clean the crud off of your mount flange, you should be able to reuse it. If you want new ones you would also have to order Ames S396.