The piece I'm holding in my hand has the poly bushings cut for $ 0.00. And I ran that very piece in my car from 1995 to 2010.
It's pretty hard to see them when they are installed in the car. The picture is an example of what they look like after 15 years of use (not much different than when installed).
On my old website 68 Cuda Autocrosser I talked about cutting the poly bushings. But AOL dumped the site a few years ago.
Yes, I don't run them right now, but that doesn't mean they won't work for what the original poster is asking for. I was looking for a higher level of performance and precision than a factory setup and willing to sacrifice some dampening the bushings provide.