Fit the UH-60 with RTM322 and the commonality of spares with WAH-64 goes even higher than 65%, surely...
Now THAT'S a very good idea. I think that engine/airframe combination first flew in 1986, six years before they even ordered the RTM for the EH-101.
And we were talking about the feasibility of Blackhawk as a Wessex/Puma replacement in 1979.
Landrover fitting in the EH-101 became a worry when they introduced the newer "110 series" coil sprung versions of the vehicle, which were bigger overall and sat higher than the old leaf sprung ones.