Hi Mark Welcome to the forums. Nice looking Bianchi, all the components are 105? cranks and hubs too? yor Kanuck bikes are bit different than ours but they were merging to be the same about '89/90ish. (I think Bianchi USA took over distrubution rights to Canada in '90)

Anyway more importantly for the 2 years that decal style was used in the US '88/89 the Super Legera would have had a "Mint Celeste" paint which was a lighter shade than this bike has. Also the '88 bikes were a SL frame and the '89 were SLX. a CroMor frame like this would have been a Campione de Italia level bike here in the US market. I am not sure how they were specced in Canada but here they a mix of Modolo/Ofmega/Suntour parts.

Hope this helps