Column help?

[Wookiee]

I have a '70 CST-10 LWB with a non-tilt column automatic and have had problems shifting into park. Within the last month, I have broken two shift levers where they neck down. I wrote the first one off to age, but the second makes me think there might be something seriously wrong. I've checked all the external linkages and all aren't excessively worn and move freely. I can shift without problems from under the hood, which leaves me to believe the problem is in the column itself. I guess my questions are: Have I missed anything? and If it is in the column, is it something I can service myself? Or is it worth just buying another column? Oh, the trans is a turbo 350 if that makes a difference. I appreciate any help.