So close to running, but then this happened!

You CAN drill out an easy out with a concrete bit... give it time to sink in....YES a concrete bit. Theyre carbide tipped. Run it slow, even pressure, lubrication. You'll be fine. I drilled at least a half a dozen of these things out of heads. Some at the back of heads on a '98 ram with a 90 degree milwaukee drill...

You'll be running before too long