I have been fighting this for a long time. I have every modification from this forum that I know of. It has improved, but I just can't get rid of the pulsation altogether. I could try another regulator, I have the old style, maybe there is one out there better than the others. Thanks a lot for reply...
Mine is the late model regulator that was transplanted from a 73 donor. It just up and crapped out. I had a new one here so I simply swapped without any diagnosing.