I'm sure you've seen this:
Also, there is this discussion on one of the bike forums:
(Don't click on any highlighted words--they're ads).
I'm also attaching a 1983 Campagnolo cataolgue, just for kicks.
Between confusing posts, symetrical vs non-symetrical spindle length and JIS vs ISO taper I'm already wishing I would have bought an IRD clone of this crankset and I would have hard and fast specifications on what BB to use ;^(