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Thing about the bottom brackets for these cranks is not always the spindle length, but the cup thickness. Earlier Campagnolo bottom brackets had thin-wall cups, later BBs had thicker-walled cups. Now we are in terrotory where only the really hard-core Camposcenti dare to tread. Bottom line is, you may be able to mix and match these elements with your cranks, but may need to do a little experimentation to get a good fit, right chainline, etc. Disclaimer: This topic is not really my bag, baby, but my purpose is to point out the potential need to shop around a bit for the right BB.