I had a 7 1/2" OM Blackhawk .45 Colt cut to 5 1/2" in '07 or '08. Installed a $100 screw-on front sight (Jim Stroh?) and added an OM Super Blackhawk hammer and "un-converted" it.
Since I only paid $300 for the gun, the additional expense was worth it for what I feel is the single best handling SA I have ever owned. When Ruger came out with the 5.5" .44 Special, I traded the .45 to a collector who'd been bugging me about it and who knew everything about the gun. He even researched who bought it originally (new) because the SN was reserved for someone.
Anyway, it handled better than the new .44 Special and I only miss that gun for that reason. The guy that got it was very happy to get it. Even though he's a collector, he appreciates the handling of that particular piece as much as I did and that is why he wanted it.
Now, before anyone goes off on me about hacking up an OM .45 Colt, first, it was MY OM .45 Colt and, second, it had been ported. I was please that it had been ported by the previous (second) owner because I could cut it without feeling any guilt. He had also had the B/C gap reduced to .002" and had the throats reamed. All the work was so well done you wouldn't have noticed it (except the porting) without noticing "correct" dimensions and having been advised of the work.
He had it done his way and enjoyed it. I had it done my way and enjoyed it. Now, a fourth owner is very, very pleased to have it.