Anybody heard of these?
First time I've heard of or have seen it, Rusty. It does seem that Holley would add a similar small part to their catalogue if it makes that big of a difference though.
This link is along the same lines of thought regarding improved atomization, but takes it one step further. I am having this done to my 3 Holley 2bbls as I post this. Turn the volume down to eliminate the "music".
C&S Racing Carburetors - C&S Specialties