440 pistons Help

Ok now that my piston questions are answered. Im trying to utilize as many stock parts as I can.

Im running a stock cast crank. What needs to be done to make this work? I am changing out pistons to the L2355s. Using stock rods.

Whats the best way to go about this. Build combo should put me at or close to 500hp. I have lots of questions about this but dont know how to ask.

whats better internally or externally balanced?

Can a cast crank be balanced either way?

If its able to be intrenally balanced do I need a new damper?

Will the old damper work?

There may be lots of questions im not asking thats because as of now i dont know of any other variables if Im forgetting something let me know.