Did the cable brake off inside the housing, so if you unhook it some is still left inside the housing? There are 8 bolts that hold it together. 4 on top and 4 on bottom. Problem is the upper mounts are hard to reach. They are 1/4" head bolts. I just took two dashes apart and much easier with the entire dash out. Good luck.
1966 SS Chevelle LS-7
1971 RS Camaro 402
Walt. It has been almost 2 years, but as far as I can remember you will have to remove the entire dash housing in order to be able to remove the instrument cluster. (While you are at it, you might consider replacing the dash pad, because that needs the same procedure.) Sorry.
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