Pietta 1860 navy grip frame test fit on a Ruger Blackhawk. 😎 Saw someone else do a 1860 grip on a Blackhawk, but wasn’t sure if my cap and ball revolver was true 1860 spec. Looks like it is.
Backstrap is a great fit.
Trigger guard would need the front hole filled and mover about 3/8″, and the slot for the trigger widened.
Then of course the back strap would need supports for the Ruger style mainspring and trigger spring fabricated and installed.
Honestly probably take me less than an afternoon to do the full conversion. 🙂
Why would I want to?
Because I have small hands and this grip is a a different profile, it’s a Lot more comfortable.
Also, I want to eventually strip and brown this gun, and the brass would look Sweet! And I like to tinker…. Can’t seem to leave Anything stock. Lol.
Now all I gotta do is snag another 1860 grip frame set online (not using these since I’m not giving up the use of my Pietta!)
Alaskan, Adventurer, Engineer. 
Now that would look pretty cool!