Re: Horn reassembly
Parts 5 and 6 are correctly assembled in your second pic. The first thing down the shaft is the spring then the cam. If you have a locking column (like 69) it goes next then the snap ring. The Steering wheel will compress the spring on the 67-68 models.
The small spring #4 goes into the post sticking up on the cancelling cam, then the pin #3 then the collar #1 that locks it in. once the wheel is installed the pin will contact the back of #8