Yep...gonna have to pull the steering wheel and all the other parts to get down to the turn signal cam. As you probably already know, the turn signal lever attaches to the cam with a single screw. If this screw becomes loose, then right turn signals become very difficult. Just need to tighten, possibly locktite that screw.
Before doing this, I would suggest getting a replacement horn contact as unless you have had it apart recently, it will break. They are $7.95 from Corvette Central. I am currently waiting for this to arrive so I can put the steering column back together. First time this steering column has been apart since being assembled in 1980. The horn contact came apart in pieces....it was very brittle.