Are you just good at fabrication or are you an audiophile? If the second, as you know, the placement and direction of the speakers make quite the difference in the audio quality, especially if you spend quite a bit of money on the set up. That said, I have planned to install all the components I have in my closet; so 4 sets of JL Audio ZR650's. (6.5" components). 2 sets in the front and 2 sets in the back seat area.
I've never put a sound system in this car or one like it and was curious if you found for the front, 2 sets in the door sounded better or 1 set in the door and 1 in the custom kick panel enclosure?