Here's a video.
https://youtu.be/w3zGfQgYS5gPay close attention to how they center the crank stroke at TDC by rotating the crank both ways to see it is truly centered at the top when they set the pointer to zero degrees..
The video shows measuring the cam at the lifter.
We would prefer to use the dial indicator on the valve spring upper retainer, so that the measurement shows the true lift at the valve.
Also, while measuring at the .050" lift points is generally fine, we would like to see measurements when it just barely begins to open, and at just a hair before fully closed, so we can get an idea what the full duration from seat-to-seat is at the valves.
So, record degree measurements at ;
.002" lift on opening and closing, both cams.
.050" lift on opening and closing, both cams.
Amount of Lift at 0 degrees TDC during intake opening. And during exhaust closing. Both cams. This is important to predict piston clearance.
Number of Degrees ATDC at the point of max lift for intake cam. And at max lift BTDC for exhaust cam. This will be the Centerline measurements.
It will probably take an hour or two to do it, if it is your first time. Once you are accustomed to doing it, it is much quicker.
Call me if you have a question/problem.