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

Sounds to me like a piston swap for the stroker is a better option.
Get it down into pump gas territory, put in a cam that isn’t set on “kill”.
Makes for a nice low maintenance mid-range racer...... that can be used on the street with no worries.

I don’t see a lighter bobweight, with no other changes, doing much to lower the ET.