Well, you should be able to bypass freshman calc, chem and physics,. http://admissions.tc.umn.edu/academics/ib.html
for some reason math looks iffy but I suspect as math HL and BC calc are taught in the same classroom at my kid’s school, that there isn’t’ any reason you wouldn’t get credit. You could be looking at 30 credits and much of your first year done. Compare that aspect at UIUC.