Just to be pedantic.... they are relocation cones, as the allow the spring to re-locate back in its original place.
on my 90 i made some "lowered damper mounts"... I cut the threaded piece off of the top mount, and re-welded it back at the bottom, where the single bolt is, which gave me about 2"~2.5" of extra droop. with some cranked trailling arms (to get the stress off of the rear bush) i got some nice down travel. no extra lift (as i used normal HD springs).
although my 110 has factory suspension, and i get around well enough! although here in the UK there's not much in the way of rocks etc to crawl over.