Im designing a new box for my FiQ for my blazer. I was was wondering where the sub and port should go? Sub up firing, port rear firing? Also if one or both rear fire how far from the tail gate should it be?

Thanks

sub up, port back seems to work most the time in suv's and hatches. both back can work great as well in an suv. sorry no real answer but its all in testing really. but with both back def. move the box around to see how it sounds using the suv's transfer function or loading off the back wall.