Great question... I wondered the same thing. I have one rusty door on my 84 TD. It's the driver's front. Hope I can just snag a 300D door! I also wondered about the rear fender, specifically the section in front of the wheel arch and behind the back door. Mine is rusted completely out, and I hoped a generic 300D patch panel would weld in in its place.

If no one else answers your post, I'll try measuring the doors when/if I get to the junkyard this weekend.

Tks,

Chris