2JZ in a Hachi, What about RB26DETT?

[NoHachi]

Hi,

Doesn't the GTR have a multilink/double wishbone hybrid rear suspension? If so, then you won't be able to use it on the hachi, it would be easier to fabricate your own double wishbone setup using ford sierra hubs. Mind you, the word easier is not completely accurate, you are redesigning the rear suspension and pickup points completely. The load paths should in no case go through the unibody, some sort of tube chassis should be fabbed to take on the load. Designing such a system either takes years of experience or a solid working knowledge of finite element computation programs and the forces at work. It would be more easy to just use the setup from a toyota truck or pickup.
The driveshaft should'nt be to much of a problem, there are plenty of companies capable of harmonically balancing it for you. Just look outside of the automotive buisiness. Another solution would be to reduce the need for balancing, a lightweight carbon propshaft reduces the amplitude of the vibrations and the energy content of the waves. At the raceteam I was with we used unbalanced carbon driveshafts (home-made), worked like a charm, even when dropping the car onto its wheels at full throttle. I know that there are several companies that produce these shafts commercially. If you cant find one in Germany, try Spinning Composites from Delft in the Netherlands.
Whether the GTR lump will fit is difficult to say. I know that it has been tried in the MX5 without much succes. The engine is too tall and long. I'm guessing to make it fit you'll have to make extensive changes to the firewall. A bit like the S2k powered AE86...
For reference, the V8 I mentioned is a compact unit and is mostly wider then the 4 cyl engine. They are a straight swap into a MX5 body with semi-bolt-in kits available. The AE86 engine room seems to be about the same size.
So proceed with caution on this swap. There is a reason that people walk certain roads, sometimes it is just the only logical road to take. I can understand though that not everyone wants to be logical, so I'll wish you succes for the test fittments.