What is the ideal weight in the back of an AD?

[50Bow-tied GMC]

I am doing a bit of research as to what is the ideal weight in the rear of an AD. I am trying to figure out what is the best weight to traction ratio. The biggest thing that I am afraid of is breaking the tires loose every time I go to take off from a dead start. I wouldnt mind being able to do it from time to time but would like to keep more than 6 months between new tires in the rear. Also, if anyone has added weight to the rear how did you do it. I thought about filling the back half of the frame with lead after boxing it in, welding steel plates in the frame, or building a box full of something to put in the bed. Any ideas?