No, the calibration of these carbs are not "all in the boosters" the boosters work in conjunction with all of the variables these carburetors have, namely jetting, float levels, idle discharge passages and slots, Transfer poorts and air bleeds.
The worse part is there is NO documentation (that I have ever found) describing all these variables and how they interact, So to put the 289 boosters into a 600 CFM carb is simply a bingo game where you are hoping and praying for a desired result but really have no clue (expletitives removed :o) ) as to what is going to happen or the results that will occur.
Now if you had a bunch of time and expensive testing equipment, one could probably start "Frankensteining" together carburetors and maybe today, maybe tomorrow of maybe next year stumble upon a good combination, but remember there are over 120 VERSIONS of the 4100, probably at least 30 or more versions of boosters (especially counting 2100 boosters as well). So which 289 booster do you choose, and which 600 body do you choose. Will any booster work with other bodies, probably after all isn't that what some of the major carb rebuilders do, mix and match pieces to get the finished product out the door. Of course that is also why some rebuilds are shit (expletitive kept in) and run like shit and you can never get them tuned.
Bottom line is since there is no documentation of all the interacting pieces, putting anything together is a crap shoot. I have looked high and low for some of this information for years (and years, and years) and have only uncovered about 5% of what I am looking for. I have heard of other people who claim to have this information but upon investigation it has proved false.
I only know of one other person who has made a claim that they have this information and uses it all the time and that is Pony's Carburetor. Jon Enyeart is a 2100/4100 expert in my opinion. He claims tro have this information and upon some research on my part I believe he does have information relating to the interrelations of all the various variables for these carbs (and others). He uses this information to recalibrate carbs. Whether this information is info he has gleaned from working with them or from actual documentation (probably both), he is not saying NOR will he share any of it.
Within the last 5 years, nowadays I am constantly running into carbs with mixed innards, which is really unfortunate. These carbs when I get them are destined to sit on my parts only shelves since there is no way to guarantee any accuacy of being tunable or runable in my experience. Also unfortunate are a couple of valuable Hi-Po carbs that did not have the correct innards in them when I got them so they are also on my parts only shelf.
Don't do it!!!!!
Bill White
White Automotive
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HAVE A NICE DAY!!!!