To the best of my knowledge, the frame is the same as the Professional, only the components are different. The frame descriptions are identical in my old catalogs.
I assume that by "building specs" for the hubs, you mean spoke lengths? The Nuovo Tipo were considered 67mm hubs, so the "nominal" spoke length for 36 hole, 27"/700C rims is 311mm for 4x and 300mm for 3x. However. it can vary quite a bit from this, depending on the actual rim chosen.