Dave, greetings and welcome to the Forum, when you look for these old model "sets" ( lock work) kits, must make sure you get the proper heigth hammer, and the center pin for the early Blackhawks have a different configuration as to the grooves and their spacing to be "proper" one of the guys who deals and collects these really early ,first models may tell you the proper "configuration" ( chad, what say ye ??) I'v e got some loose parts hammer, triggers, etc but NOT a "matched" set for that early of a Blackhawk, make it worth your time to check this out and make it RIGHT !!!
Last rod (center pin) that I had for that early of a gun, we used recently in a restoration for a guy, and he had told me what the grooves were and their spacing..........