Consulting a number of sources, this conclusion has been arrived upon that there can perhaps be no ‘guarantee’ for an admission to a ‘top school’ solely on the basis of one’s SAT score, because such schools might want to consider certain other factors as well, before they grant admission to a candidate.
It would, however, be a good idea to try and get the greatest SAT score possible, just to be sure one is equipped with the best score possible.
All the best!