66 Dart GT HT Whatsitgonnabe?

Did you fill the ring gap with grease before adding the water to measure? It helps keep the leakage to a minimum...
No, I didn't. I figured that little volume should be included. Just greased the mating surfaces btw plastic and head/block.

I won't be re-doing it. I'm somewhere between 9.65:1 and 10:1, probably not far from 9.8:1. I think that's close enough to make decisions.

Did you see my LD4B pictures?