Wow that Bertoni IS nice, strangly enough Ive never heard of bertoni...
Im planning on doing this myself for my main ride next year... got all the parts just need a worthy frame to hang em on. Right now im pondering a newer (but classic looking) steel frame for a good price and may just go with that, on the plus side I wouldnt have to spread the triangle as its already spaced correctly... the sad thing is I'd really like something with a chromed rear triangle.