sorry for reviving a dead thread
i just finished my BIT co-op and i think the cut off for my year was approx 92, not 100% sure but i think its around that figure
you'll need to make sure that once you get an offer from Co-op that you are able to enrol into the course that relates to the program.
e.g. To participate in the BIT program you'll need to be accepted for the Bachelor of Science (Information Technology) course before you're officially BIT.
Similiar to the commerce co-op programs that you'll need a BCom to do a Finance or Marketing etc Co-op program.
I think the peeps at the co-op office advises you to put that course that you've been offered a program spot for in first place to give the best chances of being a co-op scholar
any questions just holler!