You do not Sync 3 2's, you sync 4 2's.
That must be why we have 6+ lanes here.The 3 lane interstate expansion with traffic turned to shit.
You use a vacuum gauge for both,heathens!
3x2's are nothing but 1 2 barrel. Carburetors 1 and 3 do not have power values, power pistons or idle adjustments. The butterflies are thinker and fitted to be 100% closed. Them operate on progressive linkage. 4x2's are 100% 2 barrels and not progressive.View attachment 711173