Vacuum Secondary Conversion

What does this mean, exactly? I take it to mean something like "I don't care what other peoples opinions are, I know what I'm doing with the carburetor" If that's the case, tell me now and I won't waste any more of my time. Carburetor tuning can be taught easily and it's a stone cold FACT a double pumper will slap lay it all over a vacuum secondary every single time. But if you don't wanna hear it or learn, I'll offer help elsewhere.
Did not mean to offend you. Typing my thoughts isn’t always very easy for me. What I meant was that I might already be able to trade my current mechanical double pumper for a friends vacuum so I was focusing on what to use with it ie possibly either one of the distributors I posted above.
Are you saying that given many of the constraints I listed regarding my set up that the carb can be tuned to get drivability to be as good as a vacuum set up?
If so I would like very much to understand how. I really don’t want to change over if I don’t have to. Please elaborate!