One New Old Stock General Motors Part #7808090, Steering Coupler Assembly, in the sealed GM package may be for:

Various 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976  1977 1978 1979 1980 1981 Chevrolets and other GM products.

Please do your research as I am not sure about the application.