I, for one, would love to hear more about this project if you proceed.
I have checked on the conversion to electronic injection and find it quite feasable, but my injection pump seems to be holding, so I'm going to wait until it fails. This project solves that problem and adds the other technical benefits of the later transmission.
About preserving the original car:
I, like many of you, have driven and/or owned some of the finest cars ever built. And yet, everyone of them has left me wanting in some way after driving it for a short time. Every racecar is modified to fit the requirements of each driver, and every car contains some sort of compromise. The W113, while an exceptional car, has its foibles that are not insignificant. While going to a 6.3 or 6.9 engine is not for me, changing to a later motor of the same marque makes eminent sense to me. Each to his own.
Sometimes after reading comments in forums, I think an ejection seat for the drivers is in order.