Nice. The Gran Tourism is a hunk-o-junk boat anchor. Get the right chain length (just enough chain to handle the large/large combo) and a Nuovo Record will probably work (depends on chainring range). Or a Rally (but equally iffy). Campagnolo brakes will barely fit the touring model with 27 inch wheels with a dropbolt in the rear, and a little filling to the slots of the front to drop the shoes.