Just completed one using a SS Colt Government 38 super as the core component. Kart 9mm ez conversion barrel and installation kit. Everything works great. The only additional step is to have the chamber finish reamed for the proper throat to allow reliable feeding of cast and jacketed bullets.
Shoots really well using either the 38 super magazines and Springfield style 9mm mags in SS.
Very happy with the conversion and the ability to use 38 super when needed with just a simple barrel change. In the near future I plan to get a 40 barrel and have even more utility.