I am a little light and need to add ballast.

My thoughts are to make an easily changeable ballast rather than using solid lead bars.
The idea is to use a heavy metal conatiner( a military surplus ammo can) filled with lead shot, which you can add or subtract as necessary. This would be bolted to the floor of the car like any other ballast, with another safey bolt through the lid for added security.
Besides this being easy to change or adjust, I think it would be safer than a solid bar because the shot would absorb some of its own energy within the can in the event of an accident or overturn.

The GCR states only that it must be securely attached with 1/2" bolts. I don't see any other issues within the GCR.

Any thoughts about the idea or legality?

Thanks,

Todd