Ported 452 or Edelbrock RPM

I never put three angles on the valves unless I've done a TON of testing and even then it's almost never.

I almost never back cut a valve anymore so it doesn't surprise me the valve has just one angle on it. That's how it should be.
sure trues them up and makes`em look good tho! A hair liter, and most of the ones I have had back cut showed a small improvement ???????????????