Hi All.
I have for sale a fully chromed Colnago road fork from around 1981. It came off of a 58cm Colnago Super with a 15.8 cm headtube, running a Campy Super Record headset. I would not suggest trying to shorten the steer tube to fit a smaller frame but you could try.
Photos are here:
http://www.sisuhome.com/
Measurements: Steer tube total length: 20.1 cm / 7.9 in Amount which is threaded: 2.4 cm /.95 in Unsure of the rake but it's standard Colnago specs of the era.
Unfortunately a local bike shop stripped the steerer threads when attempting to chase them. I had the threads fixed by Yellow Jersey (http://www.yellowjersey.org ) and they did a superb job as is evidence in the photos. I have ridden this fork since, a few hundred miles. Condition is used, but excellent!
Price is $100 obo shipped in the CONUS. Email with any questions and I'll try to answer.
Mark Buswell
San Francisco, CA
USA