Hmm, that would be a whole new project if anything. I looked into just getting the engine just to study it mechanically to determine how to build it up. But the cost of a new engine would take away from the cost of my current project. So my eyes are open for a cheap one laying around with full harness. I might do a full tear down analysis post, but that will be ages from now. I imagine it will look like her sister the VH45DE..and she looks like this:
Not much I can post about it. But right now I can tell you, all VK56 comes with an automatic transmission. You will need to adapt a transmission if you not want to stick with the bulky sludge box. Depending on your choice of abuse (drag, track, or just street).. your options are unlimited.
There's adapter plates for them if you want to spend the gem: ( you know I'll be making my own when time comes around)
http://shop.driftemporium.com/NISSAN-TI ... DAPTER.htm
Image of a adapted VK56 with Z33 transmission:
Only warning is... get a 05 year or higher transmission.. they have a sticker on them.. usually says CDXXXX... the XXXX is series/revision number..revision number -005 is the lowest you want... 000-004 have weak sycrhros for 3rd gear.
Here's a tear down of the 350z transmission (notice my custom title/link for it

):
You can see how stout the gears are, but...3rd gear craps out... over high power abuse...chances are drag racing abuse. Tracking offers less stress of components, but most of the time I might be in 3rd gear. Obviously, I decided to tackle the beast if it comes.
I am a track car junkie, by the time I roll around to making it.. I might just source a GTR rear transmission and play with it.. utilize the shifting. Maybe play with it's guts to ensure reliability and maybe delete the AWD. All will come clear when the time comes. But for replace-ability, I might just stick with the Z33 transmission.