im working on building a 383 stroker out of a sbc 350. I know you need a 400 crank. What all has to be done to the crank and about how much does it cost?

 

you need the flywheel or flexplate and i would get it balanced, you will need the flexplate or flywheel to do this because they are externally balanced. You will also need pistons for that, which are pretty easy to come by due to it being a common build nowdays. Good luck, whats it going in?