Rebarreling
It's not rocket science, I've done a Highway Patrolman, M-15 and the only one I needed the proper frame wrench is a Victory model the the barrel wouldn't pop loose with my usual piece of lumber that fit in the frame opening. The M-15 had a cracked forcing cone, bought a used barrel ($25) and it screwed right on and was indexed, a little file work and the cylinder clearance was good. M-28 was easy, I pulled the barrel and cylinder and I sent it off to be converted to 45 Colt. Everything screwed back together perfect. Victory Model had the barrel chopped to 2", bought a used M-10 barrel $20 and screwed it on and it indexed, again I had to adjust he cylinder gap. I takes longer to set up the frame tool than it does to change the barrels.
SWCA 892
Note! If the barrel doesn't come loose with a medium pull, get a gunsmith to take it off otherwise you may tweak the frame.
OK, just noticed it was a -4, Those barrels may be a crush fit , so all my rambling was a wast of time, I've never done a crush fit revolver.