I don't want to say that its unlikely you can get to 675 by November, but it will definitely be tough. Is your max 585 or 600? You don't stay at peak strength year around unfortunately. Regarding the plan, if you feel it works for you then do it. Doing high reps for deadlift has never done anything for me, I know people there are plenty of people on this board who favor them though.
I took my deadlift from 655-700 from May to November by following an alternating heavy/light week plan and finding the right assistance movements. If something is working, don't change it. It won't work forever but just because you have trained a certain way for a year or so doesn't mean its obsolete now and has to be altered.