Great idea but if it was not on youtube, would not begin to suspect it as being an issue. They got my first cam wrong but that is before I knew to advance or retard using adjustable timing set. One could suspect errors in just about any aspect of this magical piece of hardware. I spent untold hours reading trying to grasp how differences affect performance and driveability. After I failed at that, left it up to the experts which is where I am today. Granted I have forgotten all that I understood which was almost nothing. I do remember the idea of scavenging which made sense.
Was told by my engine builder to verify valve timing angles. One would also have to consider the time it would take to verify and how often to get proficient at it.
