I had Cylinder & Slide rechamber a M-28 to 44Spl and install a barrel just like the one shown in the OP in the mid-70s.
Skeeter Skelton put a photo of that gun along with one of his rechambered Blackhawks on the cover of Shooting times.
I later had it hard-chromed.
I loved that gun, but it was stolen in the early 90s. I'm surprised those barrels are still available.
Let us know how the project turns out.
I guess most if not all of us have seen the article, but I for one never get tired of it. http://www.darkcanyon.net/Converting_357s_to_44Special.htm
Andy Horvath did a couple of these conversions for Skelton, he is still doing them!
Kevin