You might of picked up 37/47 coupe windows for the "special" coupes, Monte Carlo, Grand Prix, Cutlass Supreme/Calais. Regal. You'll need windows for a 27 coupe, Malibu, LeMans, Grand Am ('78-'81). Not sure but might be able to use 87 coupe windows, Cutlass Salon, Century. Most windows sould have "27", "37/47", "87" on them below the belt line where you wouldn't see it unless the glass was out or the door panel is off.
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