Hey hey....
As you said its a rotary engine and it needs to be someone specialised to "transform" it.
If it goes to the wrong hands it might turn out very wrong.
About the look I think you should keep it as original.
I love refurbished old cars, with something extra hidden in the engine.😉
There is one that I love:
Opel Manta A
Very good post, as a car lover just upvoted and started following. 😉