i don't know those models specifically but i run slightly different 40 dcoe's i just made sure the accell pump rod was the same length (which it wasn't had to swap it) and the progression holes are the same
the carbs should be the same apart from internal tubes/jets/chokes etc. have a look at the attached file. I dont speak italian, but you should be able to work it out.
The carbs have different numbers as they were available on differenet cars are standard equipment, and its simply webers part numbering system.
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