Shift Linkage (or lack thereof)

[gbrown]

I have a 1960 C/10 with the 235 and the "3 on the tree" transmission. First off, could someone please tell me what transmission this is as I only know to refer to it as "3 on the tree"? Secondly, I'm having some shift linkage issues with the linkage flopping about and getting stuck in or out of gear. Could someone more familiar with these direct me to a diagram of this assembly so I can determine if I'm missing parts? Finally, assuming I am missing parts, could someone please point me to a vendor? Thank you so much for any help you all can provide.