Degreeing Cam by Measuring Overlap @ Lifters

A typical performance cam will have 50 to 70 degrees of overlap. With everything assembled and the Piston at True TDC on the overlap Cycle, you have a friggen huge window of overlap to target.
Next there is no single point on any street lobe, that you can point to and say " this is max lift".
Next, Almost no streeter will ever install a cam with identical and symmetrical lobes, if you can even find one.
Next, can you say that your lifters are at identical places on the tapered Flat Tappet lobes? Not brudywikly, lol.

This idea is only good for two things :
1) with the Piston at True TDC, and the cam slid in, and at or near, split overlap, it makes it easier to slip the lined up drive kit on, and to see if you actually got dot-to-dot right. and
2) in the field, if you suspect the cam timing is wonky, it is a quick test to verify a jumped chain.
3) there ain't no three.

OP; put this idea out of your head, there are just too many variables to make this anything but an exercise, and not even a good one. Most street cams are installed slightly advanced, 4* is a common number. But this number is not measured off the lobes, but instead is off one leg of the theoretical LSA.
Only the cam-grinder knows where this is, cuz he put it in a pretty exact place; Once you get into your grubby hands you have no stinking clue where it is. You have to degree the install, and pray that it's where you think it is.

It's like your first high-school kiss; Once you close your eyes, you gotta pray you land that thing right.

Ok maybe there is a three.
After you have installed and degreed the cam, and you know where you installed it; THEN, you can find a point that is affectionately called split overlap using the straightedge method, and see that point on the balancer. Write it down. A year from now, you can check it again and see how your chain is doing........ lol. But I think there are at least two easier ways than taking the intake off ...........