If you are in Ohio, Mr ohiochuck, you might consider reaching out to Andy Horvath of LaGrange, OH. He was the one who assembled my
Project 616 a few years ago. My conversion of course was a Model 66-> "Model 616" a stainless K-frame 327, but I've actually been thinking about adding a 32-20 cylinder to expand its utility. I've got the cylinder, in my case a Model 648(??) in 22 Mag.
Just as a FYI, when you look for a cylinder, make sure you get one of the earlier, round extractor ones instead of the later, square ones. Alternatively, you might look into getting one of the custom blanks offered by Hamilton Bowen... a little more expensive, but they would be the easiest to rework.
Froggie