3 hours ago, Last Indian said:

360, you are right, light is a light, but the timing tab that the harmonic moves past can get knocked out of position. The only way to verify it’s accuracy is to do the indicator check for TDC.

Isn't the timing tab on a Pontiac block cast into the block? I just wanna make sure i'm not screwing up the terminology. I can see the balancer separating and I'm gonna mark both sides and check it periodically.

12 hours ago, 360Rocket said:

Isn't the timing tab on a Pontiac block cast into the block? I just wanna make sure i'm not screwing up the terminology. I can see the balancer separating and I'm gonna mark both sides and check it periodically.

Right you are 360! I always forget Pontiac does it that way as opposed to Chevy. That said, makes it even a little more necessary to follow the process and verify exactly where TDC is. So 10 degrees advance is 10 degrees. To do this right you’ll need a degree wheel, the proper indicator and patiences.