So here's the interesting part of all of this. I've seen it posted many times here and on other forums that bad geometry breaks parts. It is usually suggested that the stock Mopar or Edelbrock style shaft location is too low. But we see that both Billy Godbold and Jesel recommend a shaft location that is lower than mid-lift and actually quite close to the Edelbrock style location (assuming the valve length recommended by Edelbrock is being used). There are a lot of opinions on what 'correct' geometry actually is. It sure seems to me like there is a fair bit of flexibility in setting up shaft locations and much of the parts breakage may result from other problems in the system.