changing 67 barracuda auto floor console into 4 Speed one.

I had an automatic floor console, but never took it apart before I sold it, since I didn't need it at the time. If I were to buy another, would it be easy to turn into a 4 speed one, and buy a new reproduction top for it, since they do make that ?
This is why I have a hard time parting with extra parts. It's usually better to have a part, and not need it, then need one, and not have it ! I usually end up regretting parting with stuff later on.