Been a while since I've updated this thread.

With the Amazon now on the road I turned my attention back to this. To recap I had a misfire on #3 to which I've eliminated fuel and spark issues.

I also eliminated the spark plug threads so it was time to take the head off.

#3 intake valve.

https://wolfnomad.files.wordpress.co...9699572713.jpg

https://wolfnomad.files.wordpress.co...8863960905.jpg

That will do it!