The car itself is like one big lego. i can seriously pull half the dash apart with my bare hands. Its all clips. I've looked at a few youtube vids on how to remove the dash and it looks like i could quite easily take off about half the dash top and built an enclosure there.
Im also CONSIDERING taking one of my IB15s and venting it through the tire well but thats a very big maybe. Im concerned about going through the trouble of deadening/sound absorption/mlv the whole car and then cutting a giant hole in the floor where sound could come through. I didn't really have issues with the Camry and the large holes in the kicks there. If the speaker wasnt in and i drove. It was glaringly obvious there was holes in my floor but with the speaker/enclosures in. I couldn't specify a road noise direction. The car itself was super loud anyway though so who knows.
If all goes to plan and i get the guts. What ill most likely do is a horns under dash, Midbass in door(sigh), a shallow mount sub in the dash(Sundown SD-3) and an IB3-15 in the tire well for them lows.