Nearly impossible...Ask me how I know...
Mt guages are almost perfect except for the 2 little screws holding the faceplate of speedo to mechanism...They are a bit rusted and stand out..previous owner never swapped them out and I don't feel like removing my dash out now as it is original and I'm afraid I may (and Murphy's law may help me out) crack it while manipulating it...so I just left it for now...