By now even the sheltered front blower box hose has deteriorated to the point of looking bad. Easily renewed, order the 2.25 size for the blower box connections and the 2.0" size for the side dash vents. One hose length will replace one side. The seal, often overlooked, seals the blower box to the cowl and prevents water from entering this critical area. Easily replaced with the blower box still in the car, this would also be a great time to clean the 1973-76 blower grille! One length does both sides.