[Oldcarbearings]

There's a bearing&plastic sleeve that the bearing fits/sits inside so as not to wear the shaft,
There's also a conversion kit that uses a rubber housing &bronze bush here's the ford part number : 51A-3517-A,
IMHO&HO (honest&humble opinion) i'd go with the bearing&plastic sleeve as a bronze bush will wear the shaft plastic being a softer material won't......