1964 Dart GT convertible back seat

Would someone please share a picture of their Dart/Valiant lower back seat with me?

I have a newly purchased 1964 Dart convertible, but the back seat bottom appears to be about an inch away from the hooks in the floor. When I reach in between the seat back and bottom, I can feel that the seat bottom is hitting the vertical supports for the seat back on either side.

I also noticed that the top of the seat back doesn't have the hooks on it to grab the bar that goes across for the convertible well. I don't have a well liner, so I can see the back of the seat clearly.

My guess is that I may have a coupe back seat instead of the correct ones. Just curious what modifications I may need to make to get this setup to fit the car and be safe for my kids. It's either that, or I may need to push down on the top of the seat as it contacts that lower connection point to make sure it goes under there (second picture).

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