pics of said mounts
The first one pictured above is for 11/65 and after convertible mustangs. They have a bolt(nice upgrade), but they don't work on hardtops, the mount is too short(heigth wise) and the bolt holes will not line up on the block, part number for those is 2287. A similar mount, part number 2286, is for hardtops, looks similar but is taller and has no bolt. I have the 2286's and they suck. the other mount shown above is for V8 stangs made up until 10/31/65. They are the post type mount that require the cast iron frame mount. Part numbers for these are 2220 and 2221 for LH and RH sides, respectively.