snowman, lets go back to the video and start all over. Just exactly where do you see 29 degrees dwell?? Between the focus and the jiggling, I couldn't read which scale was for 6 cyl dwell and I don't see a 29 anywhere. Try that again. The 33 deg and the video.
That meter has a low rpm scale that will be much more accurate than the incar unit.
Explain the deal with the duct tape on the manifold vacuum port that has nothing to do with the vacuum advance. Duct tape is not at all reliable for pluging vacuum ports when there might be suspicion of a vacuum leak. Get a rubber cap for it. Again, explain the deal with that port. Why isn't it capped? what was it used for if it was?
This engine should have "ported" vacuum for the distributor vacuum advance. It is sometimes called "timed" vacuum as "Mean buzzen" referred to it as.
We ask you pull the vacuum hose to the distributor and plug that hose so that there was not a vacuum leak while you were checking the timing.
Your video shows that you did not??????
