To clarify, the seller notes late 1980's, it appears to be a typo in the description (1990's). It is possible the fork isn't original to the frame. I have no doubt that it is a Bianchi frame. My guess is that it could have been an employee made or custom ordered bike as it doesn't conform to what catalogs I can find online.

I like the idea of buying a donor bike for the parts, if I can find the right one, otherwise pick a part here and there ad affordablely as possible.

I would like to use period parts as much as possible. I have a nice bike that I just restored, it is just a hint tall, ergo, a 61cm frame...

Jim