Increased load capacity is what trailers and box trucks are for. Buy enough truck the first time, or rent. Load limits have more to do with the overall geometry of the vehicle than they do with just springs, you can only put so much on one end of the fulcrum until you lose all reliable braking and steering control on the other.
Half tons are called "light duty" trucks for a reason, it's unwise to ask them to do more than what they're designed to be. That includes no plowing, not hauling a pallet of concrete or lumber, or towing anything much larger than a ski boat or medium sized camper trailer. Of course today, their purpose in practice seems to more and more be limited to being a pavement bound commuter vehicle. Like a Corolla, yet with none of the benefits like never having a friend ask you to help them move, or the same friend calling you at 3am when they got drunk and went mudding in their own Corolla.
Half tons are called "light duty" trucks for a reason, it's unwise to ask them to do more than what they're designed to be. That includes no plowing, not hauling a pallet of concrete or lumber, or towing anything much larger than a ski boat or medium sized camper trailer. Of course today, their purpose in practice seems to more and more be limited to being a pavement bound commuter vehicle. Like a Corolla, yet with none of the benefits like never having a friend ask you to help them move, or the same friend calling you at 3am when they got drunk and went mudding in their own Corolla.
