E58 400 plus HP Dart sport build

Definitely understand, and your doing the right thing by asking questions. But the ballancing concern is something you need to address regardless. The factory ballance job from Chrysler wasn't very good to begin with. There is really no drop in piston that will ballance your factory assembly properly.
Yeah I'm trying to keep things as simple as possible. I do have a budget I go over it all stops and will sit unfinished for long time. I plan to keep balanced as externally balanced. If I start jerking with that many things have to be changed out and not in the budget to go crazy with that. I'm sure I'm ok so far with what I got basically a stock bottom end more compression. Once I know for sure hopefully the pistons fit the bill if not builder can help guide me right direction.