I'm pretty sure one of them should but I wanted to make sure. I have found a great deal on a Pietta .36 1862 Police (which is basically a shortened 1861 with a fluted cylinder

) and I want to replace the fluted one with a smooth or engraved one. The seller tells me a Kirst conversion for the 1851/1861 Pietta fits but I figured I would check about the C&B cylinders before sending Cabelas any money.
Thanks in advance!
Mild Myles