OER Parts offers a wide selection of Foam Padding & Seat Buns for your 1966 Plymouth Barracuda. OER Parts offers 1966 Plymouth Barracuda Standard Seat Foam, 1966 Plymouth Barracuda Deluxe Seat Foam, 1966 Plymouth Barracuda Seat Burlap Set, 1966 Plymouth Barracuda Universal Seat Foam, 1966 Plymouth Barracuda Bucket Seat Foam, 1966 Plymouth Barracuda Front Split-Bench Seat Foam, and 1966 Plymouth Barracuda Rear Bench Seat Foam.