I've "hot-rodded" a late 89 Serotta, mine came with frame spaced at 130 so
spreading frame wasn't a problem. If you need to spread the frame, have
LBS do it, they can check alignment while they're at it. The places that you might need to spend additional $ are, clamp on Front Derailleur. You will also need cable adjusters
for the STI (the nice Dura Ace ones fit fine on the DT shifter bosses, these
are probably less than $20 at LBS. My Serotta was pretty much standard English
threading, so BB wasn't problem (Bianchi might have italian BB shell ?), Not sure
about seat post for C'dale due to oversized tubes as all I've ridden is steel (27.2 seatpost).
If it were me, I'd do the Serotta not the Bianchi, based on Serotta (nova?) is a better
frame.

Marty