Above having been said, some of my favorite guns are modified 58's.
My 58-44 is an 1967-ish Model 58 with it's barrel rebored and rifled to .429" The origional cylinder is rechambered to .44 Magnum. I picked it up for a song. It's a rugged companion in the field and shoots moderate loads very well...
Cast, 242 grain roundnosed, flatpoint by Tennesee Valley Bullets at 900 fps.
Currently, I am considering the following conversion with Hamilton Bowen which will mate a refinished Model 58 that I paid $300 for last year with a shortened 1955 Target Barrel and a .45 ACP cylinder. (This is Bowen's work. Photo from the internet, but I can't remember where....)
Oughta make for a perfect fighting revolver....
Drew