"I got an ignition switch off a 72 that i bought for parts.
When you switch from "ON" (II) to "START" (III) the key does not return
to the "ON" position, but rather keeps running the starter, and when the
car fires, you have to turn it back manually. This can't be how it was
designed! Does anyone know if this is repairable? Can the switch be
dissassembled? I would be greatful for any help."
Try using some key or lock lubricant. Any locksmith or Hardware store will
have something (no brand mentioned to save bandwidth from future
dissertations on types, quality, what its called in Lithuania, manufacturing
processes, or possible Ozone depletion from a specific lubricant :-) ) That
and a little use should return it to normal.
71 GT6 MKIII KF166L