Need some steering wheel help please

[Thealien]

Trying to get the Blazer useable. It has a crappy Grant steering wheel and the horn does not work. Messing around I can get the horn to beep (sounds sick) with a jumper. I believe the turn signal cancelling cam might be messed up so I ordered one of those. I want to put a later model Chevy steering wheel on for now like the one below. This is on a tilt column if that matters.



And there is this diagram from grant. It shows a spacer/sleeve is this supposed to be there? I don't have one? Are there any other part that I should need other than the wire that plugs into the cam?