I wish I'd found this thread a while back, lifted my 110 using old man emu springs, +40 mm lift, had a really bad rattle on neutral throttle, bought wide angle props, smoother but still there, bought kinked trailing arms, no difference. The only thing that got rid of the noise was putting a bit of weight on the back.
Spoke to a few people who are supposedly in the know, one said lift the diff nose up and the other, who actually makes adjustable trailing arms said the diff nose angle does not change with suspension movement at all, even though I asked about the arms being a different length to the A frame he insisted that the angle won't change. . . .
Then I see this thread . . . Bloody spot on! I managed to find a pair of genuine land rover chassis to bush spacers, now all seems quiet and much smoother. A 10mm spacer moved the nose down 12 mm ish and now the prop u/j angle at both ends looks much better. Thanks again guys. See photos.