I totally get it. It is frustrating because this engine is not the easiest. However, I think we may have some confusion on what the 60 degree mention is. You should not be rotating the engine in order to set the cams up. You want the timing marks lined up but the engine stays in place.
Take a look at the first attachment as I think that explains where the 60 degrees is coming from which is that the timing mark is set at 60 degrees but that doesn't mean you move the crank when setting it up.
I attached the entire process for installing the timing chains. You don't need to worry about TDC because if you set it up on these marks, it will be in time. If this is the first time doing this engine, then pull number 1 plug and put a thin screwdriver in on the top of the piston and rotate the crank over with the chain off to see when it is aligned with the mark and you will see the screwdriver come up to correct position. Then you need to put the cams in the correct position for their timing marks and the engine will be in the correct position. When moving each one independently of each other, then the crank and cams can only be in one position on each revolution. In other words, each time the cam and crank come around, each piston and valve is in the same position, they are just in different positions as they relate to each other.
Hopefully this helps. Thanks.
Images (Click to enlarge)
Sunday, March 29th, 2020 AT 6:34 PM