STAT 230 in 1B?

How manageable is a courseload of MATH 136/138, CS 116, STAT 230, ECON 101 + co-op search for 1B? Want to take STAT 230 early because I'm planning to do Act Sci.

Also - is the 80% in MATH 137 pre-req to take STAT 230 in 1B actually enforced? If my final grade in 137 is lower than 80, will I have to choose a different course?