I have the same bike, 84 770 waiting to get repainted ( the original owner left 1/2 the paint
on after an unsuccessful attempt with chemical stripper). I've got all the super record bits
and the parts to build the Aspin/campy wheels. I'm going to see David at Southwest Frameworks
one of these weekends and probably do some of the work myself.
I had a 670 which was a great rider hopefully this one will be even better.

I agree looks more like a 56 than a 58.

Marty