Need some advice before a purchase. I already own an I frame HE that I know is not a candidate for conversion. I have found 32 S&W Long almost impossible to buy locally, but recently 32 H&R is showing up on the shelves even in the discount and "farm" stores. Also have a chance to purchase a "Pre Model 16". Is that model suitable for the chamber reaming to 32 H&R? The fancier builds are just not an option on my retirement "allowance".