Solid roller lifters...

It’s funny how the specs often don’t tell the whole story.
In the mid-90’s I ran an Ultra Dyne roller in my old 9.7:1 448 with ported 906’s.
.434 lobes, 259/264-108, in at 106.
It was much milder and better behaved than the RB SSH-44(old DC 510 hyd cam) it replaced.

A few years earlier I had run a RB STX-19 on a 105 in the same motor........ that thing had a very nasty and radical sound to it.