Hi This question might seem not so important but I still have to ask. I have found some parts and a 1989 Buick Le Sabre Wagon Parts/Illustrations Book PO53. But I own a 1987 Buick LeSabre Estate Wagon. To me the cars look to be very similar, but I guess there are some difference. Is there? Do you guys think that the 1989 parts list will be usable for a 1987 car? Thanks.