Well, the constant is a function of pi, so you can use as many digits as you want,lol.
And I still don't think I'd bother with all the machine work that has to be done to a 440 crank to only get (roughly) 432, when there's still 440s out there, or a fall-together kit for 489/496. I'd rather have 113 inches than 50. Just my opinion.