I fixed it all up today.
Drilled out the stuck bolt. Took forever but eventually worked. I had already during the week removed the stuck bolts from the Plog with a EZ-Out.
Hole in the head that I though was stripped wasn't. With the manifold off I gently threaded the bolt and once it caught screwed it in half way. Then pulled it out and it works perfectly. Just had to chase the threads a bit.
I used my own bolts from the hardware store (stainless) and anti-seize to prevent this from happening anymore. Pics:
Love the Plog, and the ceramic coating on the x-over really does keep temps in that area of the engine bay quite a bit lower.
