Sorry, missunderstood you there.
Anyway, the main reason (as far as I can tell) that Savoy only got Sicily in the peace IOTL was that Savoy wasn't that big of a state, and it was quite a big gain in comparison. Getting Milan
and Sardinia is going to take a few major butterflies, like maybe Savoy siding with the anti-Bourbon side sooner or something.
I don't see why. The HRE hadn't
really controlled Italian lands for ages. Anyway, there had been a Lombard Kingdom historically, so there's that going for the Duke.
One thing that I dug up during research for Vive la Francewank - Savoy used Salic Law - uniting the two is going to be a bit hard due to that.