Advancing Cam Question

I get the shade tree stuff and hillbilly engineering. Some thing need to be done once and done right. Cam timing to me is a non negotiable deal when trying to shade tree it. Get the tools, use them and make sure it's right the first time.

Seen too many cams ground off, then the timing set is a total mess. Line up the dots and the cam was 12* degrees retarded when it was supposed to be +4. Couldn't imagine how that turd would have run.

Bummer about the outcome.