Adding Weight or ballast in the trunk.

I need to figure out how to add weight in my Dart. I have four lead square bars that are about 27lbs each, just hate to drill a bunch of holes in the trunk floor. May look at adding them under the bumper.
I was just looking at that as well.......
I use a big old craftsman open toolbox, bolted thru the floor, and one frame rail
I like this idea as well!!!