I think theres several demon carbs that are designed to perform better than edlebrock performer carbs or older holley style.
http://garage.grumpysperformance.co...ing-for-a-better-carburetor.14172/#post-72081
http://garage.grumpysperformance.co...ed-intake-modification.1038/page-2#post-49827
http://garage.grumpysperformance.com/index.php?threads/demon-carbs.6157/#post-19137
http://garage.grumpysperformance.co...ing-for-a-better-carburetor.14172/#post-72081
http://garage.grumpysperformance.co...ed-intake-modification.1038/page-2#post-49827
http://garage.grumpysperformance.com/index.php?threads/demon-carbs.6157/#post-19137