580C Stanadyne timing

Hello,
I've read every thread I could find on timing the fuel injector on a 580C. But after reading I think I'm more confused because there are some machines at 8 degrees and others at 0 degrees timing on the flywheel.
Here is my confusion:
The valve cover gasket sticker says to time it at 0 degrees along with the service manual. I checked it and the timing is at 8 degrees so is it correct or wrong? It starts right up and seems to run OK. It does smoke a little and the muffler seems to...

580C Stanadyne timing

580C Stanadyne timing