The cam I was using to test fit the cam bearings had one tighter spot on each revolution, it was not the same tightness all the way around on each revolution. I'm going to check it for run out before using it in a motor, it is a steel black coated solid roller cam that I was using for mock up only on this 440 block pump gas stroker motor
I have 5 or 6 solid roller cams in the cam cupboard and this one was the one I grabbed