Ok, so I've looked about EVERYWHERE for dimensions to the back of a '88 firebird hatch, but have had NO AVAIL. I've found many box dimensions for 10's or 12's to go in the back, however those were merely box dimensions, and I'm going to need to know more of a accurate say on how much room is in the back. I'm in the process of buying the '88 firebird, but have had no time to do it, and can't buy it till I get rid of my truck. I'm trying to build a box that would suffice for 2 15's (i've trolled throughout the audio section, but they only do box dimensions, and small box dimensions at that), so didn't know if I'd get more luck here. Or better yet, can someone tell me of a good link or a good site to find this out? Thanks so much!