I need your help guys, the truck's traction really suck and not just for the race track but for the daily driving.
I decided to take the caltracs route so:

Anybody has or try them?
Any pros and cons?
Are they worth the price?
Dou you know any similar products?
Any other advice?

I also want to weld a 170 lb piece of metal under the back of of the truck's bed to add a little more weight to the differential.

Thanks for the help.