That bike is way too nice to turn into a cafe bike. I would get the stock seat and forks and drive it around for a few years. Then take the whole thing apart, restore it, put the stock exhaust on it, and have a 750 that will actually be worth something. I like cafe's just as much as the next guy, but restoreable originals are getting harder and harder to find, and in the long run, will be worth a lot more than your average cafe.