Timing Marks on the 273 [66 Barracuda]

Hey all!
I have searched for a while, not sure I am using the correct keywords.

I cannot seem to get this car timed correctly. the timing marks are quite rusty and I cant seem to find it in our shop manual.

THESE PICTURES ARE WITH THE TIMING LIGHT AND THE CAR RUNNING.
This picture shows the timing (advanced? maybe)

At this timing, there were some backfires as well as some detonation.
20220721_182100.jpg

This is where it is adjusted now. I have gotten it close to running perfect but it does stumble on acceleration.
20220721_182352.jpg

can anyone point me in the right direction? the shop manual gives me the numbers, but no visual.

thanks all!