4 speed mechanism for 69 A body Barracuda with console...

This is not rocket science. Since you have a bolt on handle, buy a rebuilt A-Body bolt on mechanism. If your linkage works, you don't need to replace it. The mechanisms are the same other than the handle interface (Bayonet or Bolt on). If you want the "correct" for the year (69) then that would be the Bayonet style. Then you would need both the handle and a rebuilt mechanism. No problem with used linkage, just get new clips and washers unless something is very worn.