I feel inadequate now.
The L24 out of a 240Z is a cast iron block. I wonder what the weight of the V12 will be complete? At least it is going to aluminum, so it should offset. The next issue will be shoehorning it into the car. Inline 6 to V12 should actually fit.
The cobbled crank and cam give me pause. If that powerball lotto ever comes through, just might need to look into this.