I have an 89 GT Vert and I want to see some of the ideas that you have come up with for sub install in the trunk. I know there are some wild ones and I just want to see what you have. I would like to run 2 10's one on each side and the amp in the middle but wouldn't mind running 12's if I see a good setup. Thanks.

 

Sorry, but all the pics I have of set ups like that so far are all in '95-'04 models.
I could post a few pics if still interested though.

 

do a search, I can't remember who it was but about a month ago a member showed how to install 8's in the rear speaker location. Looked pretty good and probably sounded better then anything in the trunk.

 

i believe this is what ttocs speaks of

https://mustangforums.com/m_5217100/tm.htm

 

That would be me. Why use the trunk, when you can use the space beside the rear seats? On an 89 the panels are different, but you could get the newer panels, or build your own.