The 1968 toggle tips we sell fit very tight at best. To make them fit you will have to remove every bit of glue residue left from the old tips and you may even have to enlarge the holes in the plastic by boring them out a little with a drill bit. Do not put excessive force on the shaft as you may damage the switch internally. We apologize for the fit but once on you will have an attractive durable set of tips in place. No returns on these although if you happen to destroy one in the process we will sell you a second set at half price.
There are three versions of shafts used on the 1967 - 1968 XR7 dash toggle switches and all three feature the same C7WB-13713-B engineering number. There is a 1967 switch with a large shaft, 1968 with smaller shaft and 1968 with a small shaft that has been milled down on two sides. The reason Ford decreased the size of shaft in 1968 was to enlarge the thickness of the plastic on the toggle tips. By decreasing the size of the shaft this increased the amount of material surrounding the shaft. This makes the 1968 toggle tip design less likely to break.