OK, an update on my 34-2. After removing the auto-pilot assembly and the 2 through-bolts, I dropped the rudder post down about 3" (so I can shim the lower bushing). I was then able to see a completely rusted zerk fitting on the port side of the cockpit cap (upper bushing). So, I actually do have 2 zerks. The upper zerk I had not been able to see, or get to, with it on the side of the cap. There is only about an inch between the top of the quadrant and the bottom of the cockpit sole.
I've now removed the cockpit cap, fixed a bit of rot in the cockpit sole where the seal had leaked, and am now ready to put it back together. I'm speculating that the zerk got rotated when the PO had the autopilot installed. I'm rotating it back to the aft side (with a new zerk) so that both zerks can be easily greased from the locker. I'm looking forward to pumping in the grease!