Quote Originally Posted by firebird77clone View Post
I thought about the trunk, but this being the deep south, it gets REAL HOT in there. Heat kills electronics.

True, heat does kill electronics but you can minimize it by running a couple of old PC fans. They generally operate on 12 volts and can be mounted on opposite ends of the enclosure to pull air out.
I'd be more worried about the size of wire used to hook up the amp and the current draw on the battery and alternator.