Welcome to the club Did it break after you got the gap where you wanted it? Mine normally do I had one 5/16 ring break that had a small bubble in the metal it in the middle of the ring away from the gap, I was using my ring expander installation tool to install that ring in a groove when it failed I' m glad it broke before it went into the engine
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)