Need a little help with this Bianchi frame. Seller believes it is a CDL but I'm not convinced

Any help is appreciated

'89 Campione d'Italia

The decal scheme is 1985-1987, while the Formula Two decal narrows that to 1986-1987. The tre-tubi designation is indicative of a 1986 Brava or a 1987 Squadra. The lack of a 1986-1987 Campione del Mondo decal would normally have me leaning towards a 1986 Brava but the USA literature does not not list it as being available in celeste. In the end, the model is of minor importance. What's significant is the lower-mid-range status and Italian origin established by the tre tubi Formula Two tubeset. If the OP obtains the frameset, the serial number should allow us determine the exact year and consequently the model.

It was manufactured in January 1987, which makes it a Squadra. The previous owner must have removed the Campione del Mondo decal or they neglected to apply it at the factory. They were rectangular and typically located on the top of the down tube, just forward of the shift levers bosses, so there may be an outline remaining as evidence. If you want to build it with OEM components, PM me, as I have the specs.