This 1991 Range Rover Classic is for sale on Bring A Trailer in Seattle, Washington. Under the hood sits a 5.0 L M70 V12 from a 1992 BMW 750iL connected to a rebuilt ZFHP22 four-speed automatic with a custom bell housing and flexplate. Power goes to all four wheels through a dual-range locking LT230 transfer case from a Defender D90. Other upgrades include Recaro seats covered in tan leather, Old Man Emu shocks and springs.
Source: Bring A Trailer
I was curious about the transmission, and it turns out the Range Rover and the E32 V12 7-series actually both used the ZF 4HP24 from factory, so that may have actually been a straight bolt-in with just a need to swap the 4HP22 bellhousing to that of the 24 variant. Not much botch jobbing needed.