The V8 mounts (original) are added on to the cross member. The original mounts bolt to the front of the engine. There are no side mounts on a 1958. The rubber mounts are similar to the 6 cyl mount spindles and rubber cushions. There is a bracket that also mounts to the front of the engine (right and left "L" shape) that attach to the spindles. I have seen these kits online also. Also take note from "COILOVER's" suggestion about the shorter bolt on the passenger side front mount.
