Question to mount motor

If it's the bike I think it is you will have plenty of room to mount the motor.

Should be no problem with any steel, diamond framed bike. You usually don't have to worry about fabricating engine mounts unless you are motorizing a chopper, stretch frame, or big tubed aluminum bike.
Post a pic of the bike anyway, as Bianchi does make a few unusual frames these days.
I'd love to motorize a Bianchi Milano (it has a curved, cruiser frame). Cheers