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Here is a thread on chops. If you look close you can see that the door window on some of them is wider at the front than it is at the rear.
http://67-72chevytrucks.com/vboard/s...d.php?t=504588
There are more threads if you type chop top into the google search box at the top of the page and click on the circle in front of 67-72chevytrucks.com. Just be sure the thread pertains to 67-72 cause it will include all years.
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