You have a lovely wife that she would buy you a Nuovo Record crankset. (Mine bought me a Super Record derailleur and it is still my favourite gift ever.)

In the 1970s, the U.S. Consumer Products Safety Commission ordered bicycle manufacturers to make a number of design changes in response to injuries that got noticed as the "10-speed" bike boom gathered steam. One such change was ordered for Campy's front derailleur cages: the CPSC required a lip to be formed into the leading edge of the outer cage plate, making it rounder and blunter instead of sharp. (IIRC, the accidents reported consisted of small children far too young to actually ride bikes getting their fingers caught between chain and cage while playing with their older siblings' parked bicycles, spinning the pedals backwards to hear the click-click-click of the freewheel. I remember my own son enjoying doing this when he was little. The lip was to deflect little rug-rat fingers out of danger.)

The "post-CPSC" derailleurs needed the drive-side crank to sit 2 mm farther outboard so it would not hit the lip of the cage. So post-CPSC spindles are 1 or 1.5 mm longer than pre-CPSC. (The other 0.5 or 1 mm was gained through subtle modification of the inboard face of the crank spider.) Spindles manufactured just after this change will bear a "+1.0" or "+1.5" stamping; later ones won't bother.

Your crank (4 inside circle) is 1984, so several years post-CPSC.

The spindle must match the cups. Nuovo Record cups are thicker than Gran Sport to accommodate the rifled grooves cut into the hole that the spindle goes through. Only the matching spindles will have the bearing shoulders formed the right distance apart for the whole thing to line up properly with the right amount of protrusion of spindle out through both cups. Subject to this, yes, you can use your current cups, (but I'd replace the bearing balls if you are going to all that trouble to rebuild your BB, unless the the balls are mirror-shiny-new.)

Handy reference: https://www.minortriad.com/campagbb.html

Edit: in the reference above, the author uses the term "axle" for what I've called a spindle in my text. Without getting into the argument about the difference between axles and spindles, I'm just pointing this out to aid in the application of the information in the reference.

Thanks for the thorough and detailed post, bookmarked! These are both NR doubles, one pre-CPSC, the other post-CPSC. I'll have to check to see if the BB is a Record or Nuovo Record and find the correct spindle (or a complete BB) for the 84 crankset. From bicycleclasssics website (and further reading of the link you provided), it appears that NR and SR both used the thick rifled cups, which mine are, so that must mean it is an NR. Bearings aren't that old; I replace them when rebuilding and have done this several times.

EDIT: she also got me SR front and rear derailleurs at the same time; nice of her and I still enjoy them as well.