I'd doubt the weight. Some physical evidence would be nice because the VK56DE has a taller deck height.
The blocks are different materials thats why.
Here's what I have to share. Just because it's Nissan 240 doesn't mean it will be tight. The S13 89-94 has a bigger engine bay then a Z32...
http://www.unifilter.com/online%20catalog/accessories.html
These guys have re-oil kits, cleaners and different layer levels for there filter.
They sell in bulk and cone. Whatever you like, just look through there catalog.
Since you willing to cut the car:
I suggest north-south layout with a transaxle, east-west won't work too well you will have unequal lenght axle shafts and a really tight space to work with on top of that you want to do inboard push rod suspension which requires a bit of math and kinematic...
500hp V8 or 500 i4 it uses the same amount of air to make its power.
However the 4 cylinder runs alot faster which means there trannys would too.
In nopi hotrod there running over 1000hp through those FF transmission using straight cut I'm pretty sure it would last.
On the other hand...
Your gonna show me recorded data so I can veiw it?
How does it being FF gear box make it weak thats silly.
:-\ plenty FF's 500 hp up in the Honda comunity are fine.
These are oem boxes too.
I dont represent them.
Lakewood bellhousing for custom applications. Theres nothing like a professionally made SFI drag spec bellhousing prices range from 1000-2000 depending of what paint or if you need a holes for a starter or a push pull type clutch.
Here's the form...
Thats peak power dude.
Anyway you can just have straight cut gears made there not that expensive.
You can do what mike said but you have to move the engine closer to cabin.
Again its not about internal weight balance any engine has good internal balance today... ITS balancing VIBRATIONand smooth power delivery.
I dont agree with you purpose of V12's are to be smoother than engines with less cylinders. A simple search in any net search engine will support this.