How would I know if a certain head unit I plan to get will fit? Or will any fit? I've never dealt with this sort of thing whatsoever, so I would have no idea.

-Joe

 

Here is a link to what you will need.

And i believe you can fit almost any after-market head unit in there. Din size (head unit height) is double and they only come in single, 1.5, and double, you just need the proper dash kit to go along with it