I always wanted to some how get hold of one of those, and outfit it entirely with Campagnolo "gran sport" components. In fact I've got a new old stock component groupo that I have been assembling over the last few years almost complete. I need only to find a used bike like yours(beautifully dome by the way, absolutely wonderful!) to build up.
Congradulations on a really fine job, and thanks for not turning it into a fixed gear monstrosity!