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1967 GMC C25/C2500 Suburban Engine: 4.1L L6; Cork-Rubber; with Separate Head and Manifold;. 1967 GMC C25/C2500 Suburban Engine: 4.8L L6; Cork-Rubber;. 1969 GMC C25/C2500 Suburban Engine: 4.1L L6; Cork-Rubber; with Separate Head and Manifold;.





