Can you guys give me some ideas on the tuning, I read something like 32Hz is good for daily, but what is good for competitions? I am looking at roughly around 10-12 cu ft total after displacement and all, this will allow me to save some room in the bed of the truck. I am newer to box designs, but I am gonna try and design it to where the ports extend out of the box a little and more into the blowthrough. I have never used round ports but plan on trying them this time, I think I can devise something that will make them interchangable, maybe even if it is sliding one new tube inside the old one to alter it. Like I said, I am still very new and any help is great. I am pretty sure I will be able to sustain that amount of power. I will be ordering a 300amp alt and a couple heavy duty batteries to put in the back as well. Note: another reason I would like the port to extend out is because, unless I am going to comps, the back seat will be in. I was thinking of having a buddy "redo" the rear seat by cutting a hole in the center and looping the cloth around. This will allow me to have a little less resistance, but bringing the ports directly to this hole I imagine would help tremendously in daily....but I would remove the seat for comps.