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I think that this paper should be of value to you. I think that several people have made this installation. Unfortunately, I haven't had any feedback from any of them on how their final fitup to the instrument cluster worked! http://jimshea.corvettefaq.com/wp-co...3rev06au07.doc
The 1977 column should fit fairly closely. The 1978 through 1982 columns will have to have the plastic shroud cut back as outlined in the paper.