I think the chevy guy lined the keyway straight up instead of about the 2:00 position. Which would put the mark right about where it should be
My 383 was rebuilt in 2023 and I used nos bearings from 1981 so I wouldn’t rely on that just saying.Yes I degreed the stock regrind purple shaft cam when I put it back together and it was definitely several teeth off. It was “rebuilt” back in ‘08 and had never been started. At least that’s what the rods and main bearings were dated
Meh, close enough...lol