Back in 2009, Rugged Rocks introduced the H233B Diamond Axle solid axle swap. Since then a handfull of Nissan SAS trucks were built in Southern California with this setup.
This setup has a myriad of advantages over prior SAS attempts on these trucks, however they wre only being built in southern CA and typically not shipped a complete kit.
For the last four years or so, the SAS kit production was halted, but starting today, the bracket kit can be purchased as a Weld-It-Yourself option. The rest of the parts are still available, you can build your axle to you own specifications, at your own pace as time or budget allows.
For more detail on this kit, or to buy now, please visit:
https://ruggedrocksoffroad.com/nissan-d21-d22-solid-axle-swap-bracket-kit.html
Thank you,
-Steven Lutz