Talked to a friend of mine that has a 1985 G body Cutlass . He told me that the Buick and the olds share the doors and roof with a different rear Quarters and deck lid.
Yes the side windows in the rear are different so is the front clip. The olds and the monty have the same frame. not sure about the buick.
The doors from a Buick are different from the olds....The frames are all the same for all gbody cars(looking for one right now for mine)The glass is probably the same except for quarter windows..
I would really like to see a kit made...Ifits the 83/84 HO or a 87 442.It would be cool to have different options for the front ends too