I had solid mounts on my 79 TA and you can feel the difference. It feels just like you have something up against the body that shouldn't be.... you get more vibration from the engine. The body mounts do serve a purpose quite well. That is, if you haven't eliminated them with solid mounts..... It's really easy to picture what they do. And what they can't do if they are solid. The bottom line is; Expect some extra vibration with solid body mounts.