zoom flywheel questions

hi < I was just searching through old threads on info about flywheels for 318. I wanted to know if this zoom flywheel worked out for you. I am thinking of purchasing that one also. I wonder if the od of the teeth was 13.19 inches and the id 12.5 inches. some info I read says it is total width 14 inches which would not fit my bell.
thanks
Webt another direction after getting a 360. Still need a flywheel