Interchangeable Body panels

[azcarguy]

I am curious as to which body panels are interchangeable on which year 911's. My specific question is decklids (engine cover) I am looking at replacing the "spoilered lid" of an 89 with a clean lid and have no idea which year I can use.

I have searched the archives and have not been able to find the information and greatly appreciate any input from the gallery.