Here's a diagram from my web site taken from the assembly manual.
http://ca.geocities.com/1970z28@roge.../orange_05.jpg
Whomever the GM Engineer was who drew the diagram wasn't too accurate, but the dimensions are correct. The stripes should not be close to the emblem and the other side should be close to the backup lights. When you measure it out the letter a in Camaro on the decklid should be between on the green in between the wide black and 1/4" black stripe.
http://ca.geocities.com/[email protected]_rear_dim.jpg
Just like to see guys stripe the Z28 out there correctly.