So i currently have 2 sa12 in my blowthrough for my truck. I got my third sa12 yesterday so in the weekend ill make my new box. I currently have this i can make the box to be 8.5cuft ported side and around 3cuft sealed after displacement and make the port 8x21 to have 168 of port area and 10.5 deep to be tuned to 50hz. Would that work? As for my electrical i have a 220 alt with all 1/0 wire. I have a taramps smart 3k ill wire them to .66 ohms. Ill get another battery if needed.