66 Dart GT HT Whatsitgonnabe?

360DartGT66 said

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?

Click to expand...

Yes, I saw them. Some core shift in the ports, but I've seen worse. It's still a good intake...

The small gap between the piston and bore above the rings is so small, it's negligible in the readings. I fill it with axle grease and smooth it out as if it were part of the piston. That way, the grease helps keep the water from leaking past the rings when you are filling the cylinder.