It seems to me that there are about as many guys that are running the "ancient, ill running, leaking Rochesters" as there are those who have switched to something else. I'm one who has no problems with the Rochester. Mine starts up good, idles good, no stumbling, accelerates good, and has never leaked. I don't believe the Chevy engineers would put a "bad" carb on these motors. If one isn't running right it could be as simple as a spec of dirt, an improper adjustment, or a bad part such as a leaking float. Anyhow, that's my .02/worth.