318 camshaft timing question

TT5.9mag said
Initial timing and total timing have very little to do with when and why it’ll ping. You need to work on the shape of the curve. Specifically around peak torque where it will most likely rattle. The vacuum advance may be a little too early also which can influence the rattle. Step 1. Is always to verify your timing marks on the balancer.

When I assembled the engine the timing marks were on point. I have a standard timing light and recently bought a new goal back timing light and they both agree with each other. Not saying that it hasn't slipped but I plan on verifying that this weekend.