David, the machine work for the engine was performed by a company that builds SCCA Formula F race car engines, so I am confident that he verified the liner protrusion.
So, Formula F race car engines use wet liners? First I've heard of that ...
Randall, did you end up doing anything other than retorquing the head? Would I be better off with something other than a solid copper head gasket?
Yeah, I tried a lot of things, including new gaskets, various kinds of dressing and so on. Finally figured out that while the liner protrusion was fine on the side I checked, the liner tops weren't actually square to the block surface, and the other side was too low. I've found that on two engines in a row (now that I know to check for it), so I'm thinking it must not be all that uncommon.
The right solution of course is to have the block machined shorter on one side; but I was in a hurry to get the car back on the road, so I tried a band-aid fix. Worked so well that I never did get around to having the block machined.
The band-aid is just a ring of .016" (26 AWG) bare copper wire, tacked in place around each cylinder opening on the stock type composite head gasket.
IMO, you would have better luck with a stock head gasket. The solid copper ones are tough to keep sealed for long, and better suited for racing where the engine gets torn down every few seasons anyway.
As a side comment, it is more or less impossible to blow "all" the coolant out the top. If there wasn't at least a quart or two left in the bottom of the radiator and block, then IMO you have a leak lower down.
But the coolant doesn't just sit there while the engine is running. The water pump sucks from the bottom of the radiator and forces it through the engine and out the top into the top of the radiator. Any leak is going to eventually allow the level to drop until the water pump can no longer circulate what is left. Once that happens, the coolant in the cylinder head will boil almost instantly and the resulting steam will force most of the remaining coolant out the cap.