HERE'S AN ORIGINAL REAR WINDOW TRACK RECENTLY REMOVED FROM A 69 SKYLARK  4 DR REAR DOOR WINDOW.WILL FIT LEFT OR RIGHT SIDE.IT MEASURES 6 5/8 OVERALL.DO YOUR OWN CHECKING TO BE SURE THIS IS CORRECT FOR YOUR APP.YOU GET THE PART PICTURED.PROBABLY FITS ALL GM 4 DOORS 68-72?