Well right now it's between -10 and 30 deg out so I can't really say if heat will become an issue. It may come summer time around here. For piece of mind I will be keeping tabs on it once it gets warmer. There's a good amount of airspace down there with the floor installed.. so just a few fans to get things moving should help.
The amp rack on the latch side of the trunk has 2 studs that mount to stock trim tabs and are secured with wing nuts. On the front of the amp rack I'm going to make some L brackets that will utilize the stock seat bracket bolts. The amp rack fits nice and tight as is.. but front brackets will ensure it's secure.