you can see the carbon buildup from the smaller port of the gasket. this gasket was ran on stock eddys and stock js.
something seems wrong with the size of the ports.
If you use good gaskets like the FelPro header gasket I believe yours will seal because it looks like you have enough metal there to get a good crush. The TTI gaskets are known to leak. It would also help to thicken up that header bead like I did for extra insurance too. I don't think its needed in your case, but it would help to better seal those out side corner areas.