Thanks juvela and nlerner
Yes, the Nuovo Record has greater capacity, but is it enough for a triple crank? Even leaving the 14/22 freewheel, with a 50-40-30 crank the teeth capacity needed would be 20+8=28, while the max chain wrap stated for this derailleur is 26. So a matter of a couple of teeth, maybe lengthening a bit the chain to allow big-big and promising to never go small-small could do the trick? In any case the Gran Sport could never handle this.
Here are some additional pictures of the painted frame with new decals as well as the old (broken) TA crankset… it was really nice !