I have ran that cam in 3 BBC's. I just love it, very good responce, good vacuum, well good enough..
and sounds great on top of that!
As for the sound, to me all 3 were very close. One was a 396-one a 402 and this one a 468. The side pipe headers on this just make the sound deeper, as for the idle, they are all almost identical.
Bowtie... there are alot of things that change the sound, but as for this one, 3 different engines and they all sounded great.
Here is my Fathers roadster with this cam, If I can find the other sound clip I have of the 402, I'll post it, it was uncaped.