Differences between 67 doors and others

[FL71C10]

I found a set of doors for a 67 GMC truck that I'd like to put on my 71. I understand that the 67 door handles are different, but am not sure how they are different. Are the doors interchangeable, and the handles are different, or are the 67 doors only usable on a 67?

Thanks!

I am posting a picture of the doors from the guy's craigslist ad so you can see what I am looking at buying.