Here are a couple of suggestions.
1) Break you your 160 mile resupply and even your 132. I would not suggest going longer than 5 days max and would target 3 days if possible. Also, I would not limit yourself to maildrops only. You can easily add a couple days worth of food and carry the special mail stuff for both the mail and store legs.
2) do not underestimate what a meal or hot shower will do for mental health. It may seem to be a waste of time but will help in the long run.
3) I believe your 4300 calories will be way too low, unless you either way 120lbs or have a fair amount of excess fat. I would target 1 calorie per mile per lb of body weight (including pack).
4) often you can hitch into town quite easily. I wouldn't rule that out.
5) take a look at this mileage summary from my PCT hike. While a different trail there are many similarities. the Sierra is conceptually like the Whites in regard to lower mileage, especially the year I did it. For an total average of 26.5 total I had 19 days at 35-45mpd. If you look here
http://postholer.com/journal/viewJou...entry_id=26640 you will find the breakdown of mileage on full hiking days. For the most part I put about the same effort toward each day yet there were major variations in daily mileage. You will need to plan for that and bank miles early in the hike to offset harder miles up north.
6) gear. You have that dialed in.
7) water treatment. I would suggest getting a full course of metronidazole in case you end up with giardia. I took that with me as part of my first aid kit. PM me and I can let you know how to get it if you want.
enjoy, drop me a note when up you hit PA.