If the part on the body is actually offset, yes, it will change with vac advance. If the shaft is bent, centrifugal advance would change it..
A close eye, maybe a dial indicator, and some good observation should tell you what's wrong.
I would label all the points on the rotating rotor 1-8, and the fixed ones A-H. Then measure the gap at each A-H for all 1-8. Should be 64 measurements. With that, you should be able to tell which one is off, and even by how much.
Or just adjust what you can, and check clearance all the way around. Set it for .005 min at the closest pair and send it. Worst case, you get 100 miles and have to ditch it for a new one. Maybe one of those fancy Bluetooth ones? LOL