Youtube videos dyno 318 magnum stock vs cam upgrade

Do they detail the rest of the build before they start swapping cams?

I've wanted for quite a while for a true "scientific method" cam shootout.

For what ever reason's most mag cam swap articles change a bunch of other stuff at the same time even though they bill "just a cam swap".
Yep, Chinese Air Gap, 600 Holley, and headers. They took the stock roller out and put a HFT back in. No valve spring change.