Seems like a good idea to post with some info. St Johns AZ, off grid, retired from Los Alamos National Lab 15 years ago. Do all my own mechanic, body, paint work. Just sold an 1985 IROC Camaro to buy the Mustang. Tech tip for rear end rattle. Try a couple bungees between the sway bar chassis hangars to pull them together. If it works, replace them.