Ok so I am confused Matt. I have heard you on this forum and on others say the stick on beehives at 140# works great, why go up to 180?
On another but related note, years ago I did testing to actually get the valves in a similar head bike to lift. Another shops heads, 1.9 x 1.61 8mm valves. Tw6hg and 570g. Went from 120 up in 4 steps to see if lofting would occur and what pressure was needed to actually control the valves up to 6200. 120 was a full failure either cam. At 140 the 570 started to behave, at 150 the 6h was ok. Worse case they would not even run down the road in the midrange.
Currently on the CVO heads I am running a Manley or AV&V double with TI retainers. Both when installed at 1.880 come in at ~155#. I also am using conicals (not beehive) at 140# 1.800 instead height for certain applications. Regarding lifter life..if you hear the valves clattering the lifters are being pounded by skipping the roller on the lobe momentarily. The stock 110 and 103 CVOs both experience this regardless of the lifters used.