1951-1952 Fargo FO1 Pickup 3.6L 6 Cyl. 1951-1952 Fargo FO2 Pickup 3.7L 6 Cyl. 1950 Fargo FN1 Pickup 3.6L 6 Cyl. 1951-1952 Fargo F3B Pickup 3.6L 6 Cyl. 1950 Fargo F2B Pickup 3.6L 6 Cyl. Our stoplight switches are designed utilizing brass or high-impact composite housings as specified, for maximum performance and durability.