I can take a look a bit later and compare bits between engines.
Wiring not too bad. I've had trouble fitting a nfu, but looking back at it, it's fairly straightforward. Wiring may just have extra interconnections, or brackets and mounts likely different. Gear lever and cables may need changing depending on the gearbox used.
Unless the engine is solid, might be just as well to rebuild it before fitting, or at least replace oil seals and do the head.