Dana 20 Ford F-Series Trucks & Full Size Bronco Transfer Case Rebuild Kit 1966-72 Part# BK20FE This transfer case has an iron case, 33.25 mm inside diameter front output bearing cones, is gear driven and is known as the Dana Model 20 transfer case. This transfer case is found in the following F-Series Truck and full size Bronco applications: 6 Cylinder 170ci 1966-72 8 Cylinder 302ci 1968-72 This kit comes with the main bearings, seals, needle bearings, washers and gaskets.