1964 Chevrolet 409 Dual Quad Very nice stock dual quad 409 - 425HP X block, high performance heads. Has all the period correct parts, been on a stand for several years, turns over fine; cylinders, pistons, crank look good. The 3361S carb is rebuilt zero miles, the 3804S carb is fresh low miles. This motor was originally put together for a 1964 Impala SS Convertible. My plans were to put in a new cam and lifters, do new gaskets and run it in an old hot rod. Engine - 3844422 Heads - 3852583 and 3814690 Intake - 3814881 Carbs - Carter 3661S and 3804S Exhaust - 3743306 and 3732793 Would consider trades: 1955 Chevy post car, 1932 Ford body, 1933 Plymouth Grille, 1935-36 Ford 3W coupe, 1934 Chevy Master Sedan, 1937 Chevy front clip, 1964 Impala conv interior and top.