Notes: Engine Water Pump Gasket. 1973-1974 GMC C35/C3500 Pickup 7.4L V8. 1970-1972 GMC C35/C3500 Pickup 6.6L V8. 1968-1969 GMC C35/C3500 Pickup 6.5L V8. Validated for fit, form, and function. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.