Slant 6 engine ignition timing stays retarded.

Mattax said
The crankshaft pully is attached to a steel damper. The damper is steel with the outer portion (also steel) joined to the inner by a rubber ring.

Thanks for clarifying. I kinda thought that would be the case. Although, no good place to attach a timing tape to accurately identify TDC. I'm learning a lot about these slants...thanks to all.