This is the fuel pump for all the years and models listed below. New old stock original AC part. Comes with gasket in original packaging.
AC40358 [same as GM p/n 6440358]
396 & 427 high performance 8 cylinder
Impala SS; Caprice; Bel Air; 396 CI 375 horsepower, 427 CI 425 horsepower
Chevelle; Malibu; 396 CI 375 horsepower