At the close of WWII the American invasion of Japan was scheduled to commence on 1 Nov. 1945
The invasion force was the largest ever assembled and all tolled was made up of 39 US Divisions. It does not take a huge leap of faith to see that these could have been used to invade the Soviet mainland in the Far East.
Yes , if you re-equip them and retrain them then putting 39 divisions into the vast wastes of Siberia in winter is a great idea .