Karl,
When you install the rear window you should also install reduced air drag clips at the front corner on each side. These were on the sledge hammer Corvette, it prevents air from pulling the rear (glass) Polycarbonate window
from lifting at the corners. They were sold by a corvette parts company a long time ago, but no longer available. Here are ones i made installed on my ZR-1.
http://www.zr1.net/forum/picture.php...pictureid=4060
http://www.zr1.net/forum/picture.php...pictureid=4059
Good luck with your install.
John
1990 white/black #2546
one of a few 4l8OE eq ZR-1's