Forget overlap. Install the cam at the intake centerline on the cam card. Then you can look at the lifters if you want to. All that will tell you is how advanced or retarded it is, not how much. Unless of course it’s in straight up. Then you’ll know it’s straight up.
If you watched the video, I explained this also. The damper or harmonic balancer will tell you the degrees it's off with the timing cover once all is verified that TDC is actually TDC.
