I think it's best to contact your local motor vehicle insurance provider (which I'm guessing is SGI for you, judging by your username).
They should either be able to answer that, or point you in the right direction.
The answer to that, legally, can most likely vary from province to province (state to state).
Just like the legality of fender width, bumper width and mudflaps is going to vary based on your location.
I'm just guessing here, but it may also be different if you can register it as a farm vehicle.
I will note that I believe a windshield down will garner a lot of attention, as it stands out.
So if it's illegal in Sask, then they might notice fairly quick.
Whereas bumper height or width being out by an inch or 2 may slip under the radar easier.