Well tell you the truth I am not sure BUT I would assume the starter parts are all the same. There were all pretty close to the same in the 69-78 years. Using the same parts across years keeps costs lower.
As for the ignition, I would just replace it. No one really ever disassembles them and so it would be hard to say but I would assume it is a contact switch of some sort.
The ride IS the adventure. The destination is just to get gas!