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Thanks for watching. I used my iPhone 12 Pro Max to make the video.

I think the deeper mark is the factory “Center” mark. Where you have it should be pretty close to max advance without some way of checking your actual timing. . However, just a tiny movement in either direction from where you are can have a huge seat of the pant feel difference.

I have never read that the M1010 had more power than the rest of the CUCV vehicles before. Nothing is mentioned in the manuals about that either. GM had 2 versions of the 6.2 back then. The EGR equipped low power version and the non EGR J code version in the CUCV trucks. The intake manifold was...