The front seats have different part numbers.
The engines have different connectors for some instruments.
Different transmission numbers, but should bolt up.
Some of the diffs are interchangeable, see attachment.
Different brake boosters.

That's all I looked up.

Depends on how much you want to remove and store for future sale or use.

Good luck and keep us posted.

Attached Thumbnails

 

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83 SD

84 CD