Quote Originally Posted by 1wild&crazyguy View Post
Check the fuel psi.

Ignition problems can do this 'come and go' stuff.

Just to get this out of the way..
Do you think the coil is over heating?
Is there a ballast in the system?

Our old ford would do this exact same thing, and it was a brand new rebuilt 460, it turned out to be the ignition module.
Fuel psi between 2.5 and 4 at the time of MECO (Main Engine Cut Off),sorry just came to me and had to throw that in. It does have spark after it shuts off, might be weak, hard to tell, I don't see so great at that distance. But it knocked the shit out of me yesterday so I felt (haha) that it was stong enough. And I have also pulled carb top after it shut off, without any additional cranking and fuel level in bowl appears to be correct. Gonna swap dist this afternoon so we shall see. And you assume that you put a new part on, (coil) and so it can't be that, but then some of this china stuff, well you never can tell. Bought a chevy solonoid once, the plunger has been the same size, well these were just a tick too small, everyone that was in stock at advance, paid 3 times that ammount at another parts house and still made in china, however it worked. Whata ya gonna do?