I am considering buying a '68 skylark for
the purpose of using the body parts for my '69 special (same body style). Does anyone know if these are interchangeable? 1/4's, inner wheel wells/fenders/doors etc.

Same stampings, but some of the holes are slightly different (for different side marker lights, etc.). Noone will know the difference except you!

Bring the lighting along from the other car, and they will work fine.

-Bob Cunningham