Hi Greg,
I started a project quite a while ago that may have some info or pictures that may be of interest to you, it is a VQ30det into 260z.
If you look at the pics in this link you will see my engine mounts and new cross-member. http://www.classiczcars.com/forums/showthread.php?16550-VQ30-DET-into-1974-260z
Also the site VQ30det.com is a forum for this motor, although not exactly the same there will be some poss useful info on transmission options as the VQ30det only comes as an auto so many people want to change this.
I have an old thread on this forum as well. http://forums.hybridz.org/index.php/topic/78920-vq30det-into-260z/
I have an new thread here about making a new intake manifold, http://www.vq30det.com/phpBB3/viewtopic.php?f=1&t=1886
If you look into some Maxima forums you may find guys doing custom intakes, or using different model manifolds, depending on hood clearance.
I spent a lot of time Googling VQ custom plenums and manifolds in images, there are some interesting approaches and you may be able to use a maxima or Ultima manifold and adapt the plenum side of things.
I hope this is of some help.
Regards Rob