I just started my TR4 engine (87mm pistons). I put it on an engine test stand. Started right up after I sealed the leak in the fuel pump. But the carburetors were having problems and while I was fixing that, I noticed the radiator overflow started to blow fluid. Number 3&4 cylinder were leaking into the water jacket. I had put on a COMETIC head gasket, made for the car (87-89mm). This gasket is about 20 thousands thinner than the copper usual. It also had a round cylinder ring vs the copper has one that follows the head shape. I could see impressions from the exhaust valves (scorch marks in the gasket and one place where it was leaking from the water jacket. Looks like air out to the water jacket, not water into the cylinder. There was NO white smoke, but lots of pressure in the radiator. The cylinders have set down into the block, not lower but not much protrusion. No water into the oil that I can see. I was looking for your opinions on trying the copper gasket back on the engine without tearing down the sleeves to check the figure of eight gaskets? Jerry TR3 with TR4 engine.