Anybody ever swapped out a heavy( stock) rotating assy for lighter aftermarket?

Wow guys, thanks for outstanding feedback
Makes it interesting to read and learn this stuff.
You are correct Dwayne. If i just freshen up This 360 and add more compression and less bobweight, other factors all the sudden come into play.
My cam all the sudden becomes a much better fit. And my probably one step too loose convertor likely works better too.
Those above two things are part of my thought process in this most definately. Not just the compression and lighter bobweight.
I have grenaded an engine before going down the track going way faster than this Dart runs. These 40 ish year old stock rods dont instill tons of confidence in me.
Its amazing, older you get, more you think about such stuff. Not sure why.... lol