Door latch
Pic 1, This is a Dakota door latch as it would sit inside of the door. You can't see, but on the edge that would be facing my hand are 3 mounting screws that hold this part to the door. To replace this part on a Dakota, you need to remove the window and the window track, then the connecting rods then the three screws, and turn it with just the right combination of turns to get it out of the door.
Pic 2, This is how you have to get it in this door.
Pic 3, This is the Dakota latch in the 49 door. The window track limits its position. Notice how much wider it is then the door width is? A piece of sheet metal needs to be formed, and that extra width has to be accommodated for. Modifications on the door post for clearance may be needed.
Pic 4, Lots of rods going lots of places, each serving a purpose. They need to be connected properly for the latch to function correctly. Fortunately they are color coded. I wrote myself a note.