If your using stock Tamiya suspension you can go to Tamiya USA and order spring leaves to add to your springs they have 4 different lengths. It works a lot better than trying carry the weight on shocks. Use the following link and look at the first 5 items on the parts list.
http://www.tamiyausa.com/product/rcp...2#.V3Zf4pD3aK0
This is the best picture I have albeit a rear set I did the same with the front. If you are hauling the weight this will take care of the squat and will still allow the suspension to flex. I believe I added 4 leaves per spring assembly.
