The CarterBrocks are not bad carbs, but their calibrations are from a different generation and their design is over 50 years old with no real updates. Again, not a bad carb, but there are better choices today.
The Street Demon carbs are about the most recent design out there and have some design advances that offer real world advantages. Triple stack boosters, spread bore design, phenolic center, secondary air valve, calibration for today's fuel, etc.
I have used the CarterBrocks since the 70s and have been installing the Street Demons the last few years. There simply is no comparison between them, the new Street Demon is a better carb for us today. Frankly, I believe the only guys that would recommend an old CarterBrock over a new Street Demon is someone who had not ran any Street Demons.
There are lots of threads on this subject here on Moparts and plenty of reviews on the web. A search will bring a lot of info.
https://www.youtube.com/watch?v=YNAlVFtUFL4https://www.hotrod.com/articles/street-demon-750-carb-review/
