Neutral balancing a 360?

Sure they've made the modified flex plates for years. I run one on an external balance 400 BB on my race Dart so I can use a neutral balance race converter. They make the flex plates for street and also SFI approved for racing. No problem, I have even measured the level of vibration to 6k with my Bentley Nevada device, and it is no more than the good running 440 I have in a different car that was race balanced at rebuild.