Given Trump's poll numbers collapsed exactly 6 months before the 2016 election (due to Clinton winning the nomination and his race-based attacks on Judge Curiel), undecideds probably break a lot more to Clinton than they did irl. Clinton wins by 6-7 points. The third party vote is also higher.
Hillary Clinton/Tim Kaine-Democratic: 334 EV 49.52%Donald Trump/Mike Pence-Republican: 204 EV 42.93%Of course, the dynamics of the race would have been much different were it known in advance that Election Day was 6 months earlier.