That's what I was thinking, I just wasn't sure. I've been doing a good amount of research and it seems that the 1" spacer was something I found to be consistent throughout, so it's nice to hear that someone else thinks so too. Especially someone from this forum.
I'll still be uploading the photos tonight, just to give you guys a visual on what I'm dealing with here. You can never be too sure I suppose.
But if all goes well, then I'll be able to move onto installing the rear speakers. I ended up purchasing a set of 6x9 Kicker DS693's, something that's a bit more than the stock 4x6's. I know that these will definitely require some modification, but there's more space to work with in the hatchback and that didn't worry me too much.
I figured I could either modify the hatch cover by cutting out some holes, or I could just get 6x9 enclosures and put them in the storage area. My only concern with using the hatch cover as the mounting area is it's strudiness and whther or not it'll sink in due to the weight of the speakers.
Would it just be better to get the enclosures? I'm trying to stay on a budget, but it depends. I'm just really desperate for a reliable sound system since I spend a good amount of time in my car driving long distances. The silence can get to a person..