it sounds like you are asking about doing this on an already built instrument. If indeed that is the case you would most likely need to remove the old fingerboard and install a radiused one. Will need a new nut and saddle as well. Not super hard to do but does require skills and equipment and refinishing etc.
Thanks Mike, The thought came to me while tweaking the Bass'nBari for the trip to the Palm Springs gathering. Since that is two and half weeks away it is now the to do later file.