Only runs 40 Degrees advanced

Have you verified TDC?
Rusty I know you keep saying that. I have done it every way possible I used a screwdriver in the hole and watched it I let it blow my finger off the number one. I checked it when I had the cam cover off and just put the damper back on to see where it lined up I’ve checked top dead center every way I could. I even had the head off And looked at number one and it was right up even with the deck.