Checking the timing on a GMC 350 5.7?

[Bowen]

If I want to check the timing on my 350 5.7 I unhook the tan wire with black stripe.Then aim the timing light at the harmonic balancer. Then look at the metal degree tab with the light. Am I looking for the NOTCH in the balancer with the timing light? Its location? Thanks its a 94 gmc truck.