+1I have just put in the parts to make my 71 Mach to allow the rear windows actually operate and have recently had to do just this. The quarter window with has three bolts, two on the top one at the the bottom that adjusts the forward/backward tilt. You will see that the top ones have a horizontal slot and the bottom one has a vertical slot. There is also an 'L' bracket (that the bottom bolt I just described attaches to) at the bottom that adjusts window camber. It took a few times to get right but it was adjustable.
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