I could be wrong, and maybe the OP took it into consideration and knows better; But I'd guess that a 6 foot, 3 point rear blade on a BX will hit the rear tires at anything close to 45 degrees. 22 degrees is pushing it.
Secondly. The larger blade will pull your BX's rear end into the cut direction.
Big time .
My 2 cents.
Hit the tires? Wait aren't all this reversible pull/push blades designed to flip around.....aka not hit the tires?
Not too worried about "pulling the rear" as I'm not looking to do anything other than scraping after snowblowing. Maybe some finish grading for grass seed ground prep....but I have a proper 48"box blade for dirt work in the BX.
I also figured that plowing at 45 degrees I"m going to lose the material faster than it can build up.