If its 'Italian' rules then it doesn't really matter what you run so long as you have downtube shifters and brake levers with the cables exiting the top so they arc 'heroically' back over the handlebars.
You can run a compact chainset, modern derailleurs and brakes to your heart's content so long as those cables are right.
My mate Chris was DQ'd on the line in Italy and had his number removed and his card taken because his brake cables were routed under the bar tape. He still rode.it
If its 'Italian' rules then it doesn't really matter what you run so long as you have downtube shifters and brake levers with the cables exiting the top so they arc 'heroically' back over the handlebars.
You can run a compact chainset, modern derailleurs and brakes to your heart's content so long as those cables are right.
My mate Chris was DQ'd on the line in Italy and had his number removed and his card taken because his brake cables were routed under the bar tape. He still rode.it