Originally Posted by Novabuilder113
I actually have a light with built in advance so I'm just concerned with tdc. The time light will do the rest
There were three commonly used SBC timing tab/damper lines. They are described HERE
A page on finding TDC is HERE
- although the way you described is just fine for getting the timing tab and damper line within a degree or so.
BTW, if you find that the damper you has the keyway in the 2 o’clock position- or 10º before the damper line, that's the tab that's commonly available at the parts store on the "High Performance" isle.