I'm not sure how old your Model 60 is, but my Model 60-14 had a roll pin from the factory.
It's not hard to knock it out, remove the old sight and install a new one.
The one shown below is on my SP101, but Meprolight makes the same model for the J-frame as well. $46 on Amazon.
You'll need a 1/16" punch to remove the pin. Lift out the old sight and insert the new one. You may need to hand fit it to the slot, but that's easily done with a file. Just take an even number of strokes off each side of the base of the sight until it fits snugly.
With the sight held in place with a clamp (padded appropriately) use the existing hole in the barrel as a guide to drill the matching hole in the sight base - it's soft and drills easily. Then insert the roll pin and you are done.