Reference post 621 about forward thrust.
Please remember that the "effective" runway for rollout has a 1% downslope on it. You can work this out from the diagram on the reverse of the SBSP Aerodrome Chart in the AIP. The resurfacing work probably did not alter the elevation profile of the runway significantly, so the figure should still be valid. Do not take the difference in threshold elevations but read the statement carefully.
I wish to make no factual statement about the difference that this would make, but it is a contribution to your vector analysis.