Well,
I think once you break them down into the 3 groups, you can pretty much pick any tube from any group to get a feel for which group of tubes you will need to stay within.
Once you ave figured this out then you can make a determination whether to go rich or lean in that group.
If you decide to change the choke to a larger or smaller choke, you should still stay with your grouping to to not complicate the matter. (I have not tried this experient yet).
On another note: What is the recommended choke to be used on the 390, 427, + engines.
I have herd that the 48 mm are too small for the BB motors. However by looking at a chart it looks like 42 - 44 mm choke should be just right. If it is a street car or road race side on the small part of the choke selection.
Also, if you run these 52 mm carb bodies what difference will make if you put the 40 mm choke back in it.
Aren't you just restricting the carbs right back down to the size of the choke?
And why not remove the choke all together on the 48 mm bodies, the horns will correct the intial entry of the air flow.
Just questions I have?