This is a big job that usually requires a rack and some type of engine stand for support. I suppose you could do it with the vehicle on the ground but it would be tough. The upper mount is the easier of the two, you support the engine and then unbolt the mount. You will probably have to jack the engine up to make clearance to get the old mount out and the new one in. The bottom mount is difficult even in the best circumstances. You will have to jack the engine up to get enough room to remove and install the new mount. The bottom mounts unbolt but since it's around the power steering rack that makes it difficult to work around.