has anybody used one of these carbs? they look like a pretty good product as they are made by holley. for the people that know about them what are the pros and cons?

 

Most of the Summit carbs are based off the Holley 4010s. They aren't bad at all for basic street applications but don't expect to get the same level of tunability that you would get from some of the big name's main stream lines. The 4010 series was designed in the late 80s/early 90s after all.