I've seen decent triggers on J and K frames; one of the nicest DA triggers I've seen was on a Centennial.
My (much) older M63 has a grooved trigger; you're probably better off with a smooth, rounded triggerface.
I learned to shoot DA with that gun, a 'Little Metal Man' silhouette, and a willingness to shoot a lot of ammo and not be too worried about tiny groups. If the 'blam' was followed by a 'ding' from the LMM taking another beating, I was happy.
The 10 shots I've handled did have a different feel DA, due to the shorter stroke of the hand. It has to get the same size cylinder moving with less mechanical advantage, so it does affect the trigger pull. The hammer and trigger move the same distance as in any other K frame.
Moon