Just FYI acoustically, subs would sound better (ie louder for a given amount of power) facing backward for pretty much every vehicle. This is well documented, reviews and studies done are on the web if you want to look into it.
I really don't agree with going to
caraudio.com, but if you can find a particular individual that you trust, then sure.
Caraudio.com is just another forum, and for what it's worth, there are lots (and lots) of those, some better than others. Car Audio Junkies, Mobile Sound Science, DIYMA, etc are the ones I belong to or have in the past. Point is, it is the person not the place.
If you are local, I'll take the job. But I'm in Vegas and you are in Tulsa.