Why would you make this modification now? My boat has square trunks and I could easily add curved boards, but I'm going to wait to let someone else do the experimentation before I go cutting my boat up.
Plus are you racing the boat? Do you really think curved boards are going to make a differience in your results?
I'm not beating you up, I'm just asking because I was going down the same path. I wanted to add curved boards until I started having these same conversations with guys in the class, my sail designer, etc, and the consensus is the I need to work on my technique first, rig second, everything else is a distant 3rd.