Grand Marquis with six 12's...your advice

[Mecca421]

Ok so I'm building a vented box for six 12's, all in the trunk. I've settled on a wedge design, 3 subs in a row on the bottom, and 3 in a row at an angle 2 inches above the bottome row. Port will be on top. This is my first build, but I have knowledge in basic carpentry. The box will be 17" for height 1 and, height 2 =27" Width =42.5", depth2= 8", and 23" for depth1. = 11.44 cubic feet. I've design the braces already. If I tune the amp to. 35hz, how long will my port be and the width???? I want a very long port, like 3 inches less width than the box. so I need to know what subs to choose from the list I have... ok. if you're still reading then here we go; POWERBASS PS12 w/ 110oz magnet, BOSS CX124, HIFONICS HFX 12D4......then here are some amps; SPL GORRILLA 5500/1D, POWER ACOUSTIK BAMF 5500/1, POWER BASS ASA 1000.1DX, HIFONICS BRUTUS BRZ2400.1.. I will be looking for all the advice I can while I do this build.