[Woodz428]

In most cases the weight added to the flywheel/damper is to compensate for weight that can't be added within the crankcase. So, I would surmise that the later 50oz. components are to compensate for new piston weights or something, possibly less crank weight. In your combination, I would have it professionally balanced prior to assembly, so it doesn't really matter. The balancer would add any needed weight when he balanced. The main difference would be the one piece seal on the later ones, if your block doesn't have a single piece seal, the later crank may not work, the later 5.0 guys will have to give a definite answer on that.