So I put this thing back together after the cam bolt coming loose. Now I need to be quite clear that I only slid the gears back enough to put a new key in and that was it. The gears and chain did not come
off the car, and were not rotated.

So everything is back together and my timing (with a light) advanced like 15 degrees and the damn thing is knocking and detonating. Put some
octane booster in and it did help. Also spun this disty so I am at 15 before and it seems better.

Question is how did the timing change? and second,
now I'm a little nervous about cam timing. I found my degree wheel. Thinking it fits very nice inside the crank pulley. Maybe I can make a mark on the pulley for tdc and how it relates to the wheel, and do a degree in check like that just to be certain the dang thing is close. Not sure whats going on.

Any thoughts?

Thanks,

Doug