Re: Sealed 12 or ported 10
My sub is facing forward into the passenger's seat and the port is side firing on the opposite side into the driver's side b-pillar. You don't want the sub and port on the same side, or at least, I don't think you do. I think some people say the sub is better behind the driver's seat w/ the port side firing into the passenger's b-pillar, but my configuration seems to work fine.
Also, I don't know if you're making your box 1.62 cubic feet, but that is too big. I wouldn't go bigger than 1.5 ft^3. For port area, I think I have 14 square inches per cube, so I have 21 square inches total. To be honest, I would probably up the port area and tune to 35 if I could do it over again.
2007 Silverado Classic Regular Cab
MB Quart ONX4.125
Hybrid Audio Imagine
MB Quart ONX1.1500D
SSA Icon 10"