The owner of this Nissan 350Z really enjoys building projects that are challenging. For example his previous project was a DeLorean with a 2JZ. So after purchasing a clean 350Z he sold the VQ35DE V6 and set off to install a turbocharged VR6 in its place.
Unfortunately there are no engine swap kits for VR6 engines into 350Zs so the owner was going to have to make a lot of custom work. The 2.9 L VR6 was installed with a pair of custom engine mounts. The oil pan also needed to be notched for clearance.
The owner wanted a lot of power so the engine was upgraded with a ported big valve head, Ross pistons, Cunningham rods, Tectonic Tuning 276 camshafts, LS3 ignition coils and a BorgWarner S363 turbocharger. This combo was good for 550 horsepower to the wheels but the engine is strong enough to handle 700+ horsepower.
All the factory Nissan gauges work perfectly because the owner was able to use the factory wiring harness with a MS3-Pro engine management system. The owner was nice enough to draw a detailed schematic for anyone wanting to install a VR6 engine in a 350Z using the stock wiring harness.
The owner made a custom bellhousing adapter which allowed the factory 350Z transmission to work with the VW engine. To handle the increased power the clutch was upgraded to a Z1 twin-disc and the rear end was swapped to a Infiniti G35 LSD.
Source: My350Z (build thread) and SEO Motorsports (no longer active) via ESD readers Chris and Ñathanael