Don't believe I've ever seen a Bianchi that color. Is that yellow for the Tour de France?
However even Sheldon saw the advantage of upgrading components on bikes. I bet a 11 speed Shimano or SRAM group will do a lot for that bike! Here is a note from his personal bike page. So evidently he once had a Bianchi Brava.
1990? Bianchi Brava
Japanese Bianchi road bike, originally came with with Shimano Santé derailers...early 7-speed setup. I built up a pair of rather light tubular wheels for it, just for the retro-kick (and 'cause the rims and tires were free!) It's not that retro, though, 'cause it's got Ultegra
STI shifters with an Erickson "Gizzmo" triple adaptor, and 28/38/50
Biopace chainwheels. It is now a 24-speed, with a 12-25 cluster, STX rear, modified RSX front derailers
https://www.sheldonbrown.com/org/bicycle.html#brava
Nice bike regardless of whether you choose keep it original or not!