Transmission for push-button Barracuda

Thanks for the responses!
The photographs make it very clear what you are telling me, and very clear that I need to provide some of mine to help you understand my circumstances.
I'm led to believe the 318 is a '65 model, but I need to clean it up to get to the numbers before I can be sure - and then I can take pictures. I neglected to add to my first post that the shell is/was a slant 6, so I'm anticipating different locations for engine mounts.
I was dubious about the push-buttons myself, despite having an injection of wise old-timer suggestion, because they seem such an anachronism; my preference is a floor shift and an automatic transmission. Obviously, some drivers would prefer manual shift, but I am among those who don't want that much work while driving.
Thanks again for the replies, much appreciated.