This NOS fuel pump is a rare gem for 1968-1975 Buick GS 350 Skylark Custom owners who need a reliable replacement. Manufactured by AC Delco, this mechanical fuel pump (part number 40579) is designed to keep your engine running smoothly without the need for air conditioning. It also features the other part number 6417173 for easy identification.With its brand-name quality and compatible fit, this part is a must-have for any Buick enthusiast looking to restore their classic vehicle. Don't miss your chance to add this AC Delco fuel pump to your collection today.