bbs02b to bbshd upgrade. Doable?

My motor case is just about 123mm, the same height of bbshd (dimension B). But I still need to stuff all the cables. Already really tight with bbs02b, which is 110mm height. But I'm thinking maybe I can saw short the heat sinks? Or I can also open a window in my case. I searched the web for size comparison but there aren't many. How do you think?