spoiler fitment

[shuffln]

so i'm trying to put a gt rear spoiler on my 86 LX and kind hit a snag. if i have it on right at the back where the hatch starts to curve down it is out at the back window about 1/8" if i move it right up to the windshield it fits nice but there is about a 1/4" gap from the edge to the hatch body line. any one know the correct fitment of the open center rear gt spoiler.
http://img.photobucket.com/albums/v236/globalmaa/Mobile%20Uploads/IMG_20141209_201038_zps037c36c2.jpg
http://img.photobucket.com/albums/v236/globalmaa/Mobile%20Uploads/IMG_20141209_201050_zps3e19537a.jpg

now if i move it back
http://img.photobucket.com/albums/v236/globalmaa/Mobile%20Uploads/IMG_20141209_201124_zps2a76f8ac.jpg
http://img.photobucket.com/albums/v236/globalmaa/Mobile%20Uploads/IMG_20141209_201132_zps9ec74072.jpg

[Ponyryd]

It needs to be all the way back, once you tighten it down the gap at the front should be gone.

Here's a shot of my old ride, can't tell much though.

http://i51.photobucket.com/albums/f359/RDF01/2006_0926Image0011.jpg (http://s51.photobucket.com/user/RDF01/media/2006_0926Image0011.jpg.html)

Also, if you use the IMG link on photobucket it shows up as a photo, not a link.