Here's both cylinders side by side, orig on the left the Kirst on the right.
If you find that you truly need professional help then this Kirst associated gunsmith in Texas named "Hoof Hearted" would be able to help you to fit those conversions for a reasonable price. He's an FFL licensed Kirst conversion specialist who works out of his home, loves guns and helping folks out.
Take a load off and peruse the site here. If you have questions send me an email firstname.lastname@example.org or give me a call, 9 AM to 9 PM Central (TEXAS) Standard Time, (817) 219-2966
Thanks Gary! I'll keep the info handy.