78Buckshot and Carl are onto something.

Mr Google says Cottage Grove, Oregon is 650 feet above sea level. If you lived in the mountains, your carburetor needs to be adjusted for the heavier air at low altitude.

Also, are you sure you have a Quadrajet? They weren't introduced until 1965.

1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)