Changeup, you should have no problem getting in with an 83! I'm in the marple day program now, and most of the classmates I've talked to had TEAS in the 60's and low 70's. For the first semester, clinicals start in October (you're in sim lab for 2 hours on your clinical day each week until then) and it's a 6 hour clinical day once you're in hospital. We're there from 6:30am-12:30 (or 1, depending on if the group decides to do lunch break or not); my understanding is that virtually all the clinicals are at that time, with the very rare group getting put later in the day because of any specific facilities' schedule. Your schedule and clinical site is the same for the entire semester. You absolutely do not get to pick your schedule, your clinical site, or your instructor! In addition to the lectures (2 hours, twice a week), clinical (6 hours once a week first semester, 6 hour twice a week second semester, and then 7 hours twice a week for the second year semesters), and simulation lab (2.5 hours, once a week for the first semester) you'll also have to carve out time to go to open sim lab because there's a fair amount of peer testing on skills that you'll need to accomplish before going to clinicals - I'd say an additional 2 hours each week for that.
Good luck on your application!