Stop in for a cup of coffee
They are called floating power mounts.. used on mopars til 61 but my 62 musta been a early build cause it has the 61 engine and trans mount.. the trans actually sits on a big spring with a rubber biscuit on top.. My motor mounts are fine luckily.. and if they do break their design makes it so you can just drill through them and make a solid mount, i would rather not if i can help it though :)