Would a 66/426 class rank be very detrimental to my application(That's what it is now and it is literally impossible for me to raise it more than a few spots even if I get all A's the rest of the way)? "Unfortunately" I go to an elite high school(Approximately 1/4 of our students get a 30 or above on the ACT) so even with a 3.86 UW/ 4.3 weighted GPA my class rank is not elite. Will they factor in how good my high school is when looking at my class rank?
I took the SAT in January and I'm guessing I got at least a 700 in both math and reading(I got a 70 reading and 71 with on the PSAT), but I didn't do very well on the essay in the writing portion. On the ACT i got a 33 math, 32 English, 30 Reading, 28 Science but I took it without studying at all so I'm sure I'll be able to raise my scores if I just study a bit.
I don't know for sure, but 66/426 is not going to help. You can hope that no one that is #1 through #65 from your high school that lives in same Congressional district as you and has similiar SAT/ACT scores and won't apply to West Point. From what you are telling me, unless your high school is very liberal, there is a good chance somewith with higher class rank than you have a similar SAT/ACTS socres.
Don't underestimate the power of 7th semester transcript. Yes, there are appointment decisions made based only with 6th semester transcripts, but many cases decisions are made after 7th semster transcript. So if you improve few spots, say 5 now and perhaps improve 10 to 15 spots by the end of the 7th semesters, you could be in the top 40 or top 10%.
It seems like you are looking for what is good enough. Your ACT is very good, but you can hope that it is "good enough" or you can study for it, take it again, and if you score higher, you just increased your chance of appointment. Sometimes the difference between I could have attended West Point vs actually attending West Point is the continous effort.