Firstly welcome to the forum Matt.
What you are proposing is doable but you will require a certain level of skill sets if you are proposing to carry out the conversion your self.
I have all the parts in stock that you will require including 350DE, 350HR and 370Z engine and gearboxes including cross members, prop shafts,
wiring looms and ECUs etc etc etc.
Once you have decided on what power plant you want then I can also provide you with the measurements etc.
Alex.