Hey there BasicAcid,
I too am hoping that the 3rd year of the BSci and the Masters will be a bit more practical based but I have been watching my boyfriend do the Masters in Mechanical Eng and it just seems to be a whole lot of maths!
At the moment I am taking two maths subjects, Calculus 2 and Linear Algebra. I had to take Calculus 1 last semester but since you are taking Spesh, you won't have to. I didn't do high school in Victoria, and it was 10 years ago, so I don't remember that well what we did, but essentially Calculus 2 is an extension of Spesh without the probability/statistics (so basically an extension on complex numbers, trig, hyperbolic trig, integration, differentiation, which all lead towards solving first and second order differential equations);
and Linear Algebra stems from the pretty basic idea of matrices, vectors and linear relationships that you will have done in Spesh. Linear Algebra is pretty conceptual and you really need to think abstractly about maths - but I can't say how much it related to Spesh. I think it's pretty new for most students and it forms the foundation of most engineering disciplines.
Obviously Engineering Systems Design 2 (another subject I'm taking) is not specifically maths but is somewhat maths heavy, just with more practical application.
Hope this gives you some idea?