1979 GMC C2500 6.6L V8. 1980-1986 GMC C2500 5.0L V8. 1979-1986 GMC C2500 5.7L V8. Notes: Engine Intake Manifold Gasket Set -- Contains one crossover restrictor; Composite. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.