Adding Weight or ballast in the trunk.

My next dot tire race in in a couple of weeks. I'm trying to come up with 120 pounds of weight to put in the trunk...maybe 160 lbs.
Here is what i'm thinking. Assuming that my car has 47% on the weight on the back wheels, and my car and I weight a total of 3860.
If i put 120 pound in the back my car will be 50/50 weight distribution. It might even hook with them hard rubber pizza slicks.
Well, a guy can dream any ways.

The goal is to equity distribute the weight on each side in the trunk. Then I start thinking,.... its going to be more then 50/50 Because, the added weight will be behind the rear axle.

I'm going to have to be ready for any thing, Will it actually hook and pack the front tires? (some thing that i have been very close to, with my good slicks, but never pulled off). Will it pull the front tires and pull one way or another.............or will it just simply spin less, off the line.