I AM PARTING OUT A 1966 CADILLAC COUPE . ARE THERE WAYS TO FIND OUT WHAT DIFFERENT G.M. MODELS HAVE THE SAME PARTS ? LIKE IT SEAMS THE WINDOW GLASS WOULD FIT AN OLDSMOBILE OR BUICK OR PONTIAC !! ALSO ANY INFO ABOUT THE REAR END ?? WHAT RATIO? WHAT YEARS WERE THE SAME OR INTERCHANGE? ALSO , HAVE AN G.M.C. DIVISION TRANSMISSION IN MY 1984 OLDSMOBILE CUSTOM CRUISER WAGON ( WHAT IS THAT ABOUT ?) THAT IS STUCK IN NETURAL WHEN PLACED IN REVERSE ?? ( BEEN SITTING BY THE BARN FOR A LONG TIME ) WANT TO FIX AND SELL TOO. E-MAIL ME AT [email protected] IF YOU HAVE ANY INFO ! OR A LEAD OR NAME OF THAT BIG PARTS INTERCHANGE BOOK ? I HAVE SEEN WAY BACK WHEN . THANK'S Mike in FLorida .