73 duster doors - what's the difference?

There's a difference I know, and I pm'ed whitepunkonnitro and he quickly and kindly told me I could switch to 74 doors no problems.
Here's my problem: It started with one of my great ideas. In my haste to lighten the duster for drag racing I gutted the doors. Before I did I bought a set of 74 doors which in hindsight I should have gutted those as I don't remember if they were rusty on the inside or what but I believe I used one of the front right fenders from that same car and it had some Bondo in it and stuff.
Now I want stock working doors again, but still don't want brown doors in unknown condition as my originals are in excellent shape (externally). The 74 doors are deep in storage and ain't gettin dug out for a few weeks.
Ok finally the question!: can I take the inner workings from the 74 doors along with the inner skin cut to match where I cut the 73's and weld it back in? Or are the inner skins different and don't match? I guess when I finally have them side by side I'll know? But I was wondering if someone might know if this could work?I guess I just don't visualize the exact differences.
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