Hi,
isnīt a big deal to catch an V8 engine from Mercedes M113 series, an transmission, rotor shaft, differential and exhaust, but the biggest point on the whole story is to fit the electric and software!
So if you will spend time and money like me or lantanta so try your way. Im sorry, canīt get you any paperwork to solve all points you will had in this project.
regards V8 Max