If your rocking is in a fore 'n aft motion, this is largely contributed to by the shape of stem and stern overhang and resulting ends bouyancy.
If you change to lead you have a few considerations to make.
Volume for volume, the lead is much heavier and will change your roll centre height, and the resulting sailing angle (your list).
This then involves the designed sailing lines for your hull
As an example, but going the other way, my class of boat was designed with heavy wooden spars, and 12000lbs of lead.
The pendulum effect of the heavy spars dampened the stability motion speed of the lead.
Some owners changed to aluminum
masts and found the lighter weight above no longer balanced the ballast weight equation, and the boats became jerky and not as "smooth thru the water".
There is a lot to consider before possibly ruining (improving
) the boat.