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Is there a difference in the door shells or frames of a power window door and a crank-style door? I doubt it, but want to check first. I'm about to purchase a door off a 72 for my 73.
I am fairly sure that the shells are the same in regards to power
versus manual windows. The minor differences between all C3s
are the door panels (screw holes/window crank locations), different
lock sets, side mirror.
Your 72/73 swap should be unnoticed - aside from the possible
difference in the side impact bar (internal).
My 75 had 78 doors - now on the 70 rear clip.
Pretty sure the door and wiper door do not interact.
Catalogs show power window regulator is 68-82.
You might need to drill out some rivets ... but it should all fit.