Whats better,grinding a crank or line boring?

If you are to the level of worrying about the weight of the crank, you're beyond factory or 440Source IMO and you should be getting a better crank of not worrying about it. What has been done to the Stage heads? It would take a very seriously done set of Stage VIs to make those numbers. I would say a solid 600 is doable on the facvtory crank... But with all the work, just use Brandons. You will spend more, and have a factory crank with all it's miles and the factory crank will not have a decent radius unless your grinder puts them there (more cash...) You talking about $500 in work on the crank alone. You can get a rotating kit with decent pistons and rods for $1600 plus shipping, checking out, and balancing right from Source that will drop into the block with no muss or fuss.