<p>I believe nov testing dates are fine for ED. on the website it only says Dec scores may not reach the office in time.</p>
<p>I would highly suggest retaking iic (or consider taking ic) for SEAS since math is the fundation of most engineering majors, and 660 puts you at ... below 50th percentile?</p>
<p>It won't kill you, but if you're determined to improve it, it's a good idea. But I got a 660 in Physics and got into SEAS, so no, it will not "totally destroy your chances"!</p>