Retake SAT IIs?

<p>I need some advice... I got a 750 in USH and 740 in Lit the first time I took it. I'm applying to some Ivies, so would it be a good idea to retake both one last time to see if I could get something higher? Or are those scores good enough? December would be the last time I can take it, and deadline to register is in three days, so any help would be appreciated.</p>