Hardware, latches and regulators will work in all, though as mentioned early regulators & glass are different.
I agree, that's what I had heard before, but I'd like to add that while it is possible to install the late regulators into an early door and vice versa, there is some added difficulty when putting the late regulators into an early door due to the lack of some of the access holes in the early doors. Of coarse, you could just drill the holes yourself if you can figure out where to put them, but it is also possible (though more difficult) to install them without drilling. That is just what I had heard from someone who had done it. I haven't tried myself.
