Is it OK to break with a design system in certain cases?

I am designing a lengthy questionairre (36 questions). Per our design system, I am supposed to use a modal popup (because it will make production faster).

I think that I should break with the design system (popups have to have 80px paddings) and just make it full screen. Because there are a lot of questions, it would be better for the user not to be disturbed by a blurred background, and it would be better to have a bigger screen area. On the other hand, it breaks with a system-wide decision.

What are the consequences that I should consider in making this decision?