Never run one, dont think I have heard one run/idle. I have had about every other MP cam from time to time.
Project needs to idle good, and have good street manner's.
I hear the sound maybe just A have a hair more lope than say a Resto Magnum or 6 pack cam.

[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]