With the B-L borders, no Ukraine to strip-mine for food to sell abroad, so industrialization-by-brute-force might be rather difficult.
Much less oil to sell abroad too, since Baku will be in the hands of the Turks and Georgia an ally of Germany (under Menshevik control, no less--they won't want to deal with Lenin).
So, how much later could the SU become a fully industrialized country without the Ukraine?