I am absolutely sure that Ford uses heavier duty components when it designs a DRW compared to a SRW. After all, there is 1500 # more load carrying capacity in a DRW compared to SRW.
I'm thinking this is not a good idea - and it would be expensive on top of it.
Better to buy a DRW rather than try to convert a SRW - and that may be the reason it is difficult to find info about such a conversions. Those folks in the know, know better than to try.