Simply put, I use the harmonic balancer AS THE DEGREE WHEEL (it's on the crank just the same), and the timing cover "0" as the indicator. Once verified, it's just as accurate. Timing cover "0" as indicator, I have 10* of timing either way. IF the cam is out more than 10*, I say get another camshaft !! And, many aftermarket balancers (like the one in the video) shows 60* of advance timing, should your cam need to be degreed to that :D :D
