In regards to the how, get an angle grinder and a thin cutting disc and go for it.
As to how legal it is you've lost a bit of impact protection so an engineer probably wouldn't like it, but it's all down to how you justify it to him.
You might find that your front end will be a bit more flexible, as your inner wings provides quite a lot of support to the front wings and where the bonnet meets. That's just my thinking while I'm on the train, I've never seen it done fully in the flesh so the wings might have enough stiffness to stop that.
_________________ Simplify and add lightness
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