Having an impossible time decoding

So i picked up this 1964 Dart 270 four door with 4 on the floor. Everything appears to be original although, the original exterior color is Aqua so the car has been repainted. The weird thing us that the codes on the tag... well, some appear to go by '65 identification so I'm guessing this was a late '64 that got an odd amalgam of codes. In any case, no matter how many sites I visit, the tag on the fender well doesnt appear to coincide with codes I'm told I should be seeing.

I'm also curious if there is a concrete way of telling which transmission belongs in the car, without the build sheet that is.

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