Steering Wheel Column Help

[gordyzx9r]

1970 C10...but not original.

At some point, someone swapped out the stock steering wheel for one from an '88 to '90 ('94?) Chevrolet truck. I think it's called a sport-steering wheel.

When I first got the truck, the horn didn't work but we didn't really care at the time as the truck was pretty rough and we just used it to run errands.

I recently had bodywork and paint done to the truck as well as some other things to bring it back. And while it was there, they said they could fix the horn for me.

They got it working. Great.

Got the truck back, been driving it. And then I notice the turn signal isn't canceling after a right turn. I seem to remember changing out the turn signal canceling cam at one point and/or the turn signal switch but I might be confusing it with another vehicle.

Anyways, I went to take off the steering wheel to see if one of the springs popped off on the turn signal switch or if the turn signal cam broke. And neither of those things happened. For some reason, I have a few different turn signal-cancelling cams in a parts box for the truck. But the one that was in it (the white one in the middle pic) seems to be the correct one for it but those cams on it seem small compared to the other ones. I put it back, and now sometimes it cancels the signal on the right-hand turn, sometimes it doesn't.

I was surprised though. There is no lock plate and spring? Is there supposed to be? I see it on some C10s in different youtube videos but when I look at a parts diagram I don't see that one is called for.

Also, not really sure how the horn is actually working here. The wire from the horn button goes through the black sleeve and that slides down into the turn signal canceling cam. But it's just sitting down in there, it's not actually seated or held in place by anything other than the friction from the wire pushing it down I think. There is a notch in the canceling cam sleeve and a peg on the black sleeve...but they don't line up at all.

And when I put the steering wheel back on...how tight is that nut supposed to be? If I go too tight, the wheel won't turn...but if I loosen it up there is quite a bit of play in the wheel (pushing/pulling it towards you).

Anyways, from the pics...what is the best way to get that steering wheel to work properly with the column to make sure everything functions as it should?