Yo Brooklyn,

It would be criminal to put anything but period correct
on that frame.
Check out the classifieds on Campy Only, and also
check e-bay for Nuovo record (or S. Record if correct!),
there is alot of stuff out there, you just have to look,
and you don't have to break the bank to get it.
I've seen complete Super Record Gruppos going for less than
$500.
I completely agree with the Suntour Ultra freewheel, but thats
about as far as I'd go towards "modernizing".

Marty