I think you'll be turning the crank for some time to get the master link back on TDC. When I marked my chain and gear and then spun around a few times, the mark on the chain was never again in alignment.

Are you sure your at 0|T on the crankshaft as per Brian's clean up the tab and wheel so we can see the marks clearly? If you can spin engine freely with that much advance/retard on the cam something is fishy.

I also think that spinning the engine without the cam in is kinda risky. It'll be a 2 man job since someone will need to keep some semblance of tension in there.

I think the better approach is get the engine to TDC, then pull cam (you will need to remove cam gear to make this work). Rather than following FSM cam removal untorquing sequence you will have to untorque ALL towers in the sequence mentioned because it is based on the cam being at TDC and there's pressure on different lobes of the cam 40 degrees away. You won't know which order to do it, so only foolproof way is to loosen all in parallel with each other. Once cam and gear are off you can reset the cam to line up the marks on the cam tower.

Do not loosen cam gear until you are at crank TDC otherwise you'll have movement issues where crank will move, cam will not.

Even after doing this, the IP timing is not certain.

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1982 300TD 210K miles ("The Replacement" aka "The Anvil") - SOLD
1979 300SD 245K miles (never ending project)
2007 Pinarello F3:13
1995 Ducati 916 (SOLD, sniff)
1999 Ducati 900SSie (SOLD)