Here is the stock spring plate compared to the SDHQ spring plate/traction bar mount.
The SDHQ spring plate/traction bar mount would have bolted right in but our Hellwig air bag mounts lateral location bolts got in the way.
Our solution was to get rid of the bolts and weld the airbag mount to the axle tube. This was not that hard and only took a few minutes.
We left the main mounting bolts in place, got rid of the lateral bolts and welded the mounts on. Here is the weld before we painted it. Our truck uses the airbags because we use it for towing quite a bit.
The frame mounts for the traction bars bolt right in using existing holes so no fabrication was needed.
For the drivers side frame mount we had to move the gas tank out of the way to install all the bolts. We supported the gas tank, disconnected the fuel filler hose and the evap canister line. Then we undid the gas tank strap mounts and swung the tank out of the way to the right. This is easier if your tank isnt full of gas and heavy.