My gunsmith will do the conversion for $40.00 that includes shortening the ejector rod and rethreading it. He did it on a model 10 for me and now will be doing it on a Model 64 for me. The 2" barrel cost me $27.50 add $40.00 for the labor and $230 for a Model 64 4 incher. So for a $300 investment a $500.00 gun. Sorry for you guys that don't know any better how to get things done.