Copper head gaskets ?

Sort of off and on topic, but just read an old article in Mopar Action about their flying brick as they called it. Really nice car. Anyway, Ray Barton used copper head gaskets on thier engine. Small block stroker I believe, but could be wrong there as I was just reading a bit here and there on the article. I do know though that he O ringed it. Don't know if this was his standard practice, was due to their application or was due to the copper gaskets on a Mopar need something like that.

On the other hand, this is where it gets a bit off topic, classic Minis have used copper head gaskets for years. The classic Mini does have a 2-3 trouble spot between the cylinders, but many, many have run years on a copper head gasket with no problems. Comes down to quality of build and correct head torque etc. Compressions on some we've run have been up in the 11 to 1 range and all run a high rev band with no problems. I know it is a different engine etc., but just an example. EDIT: Oh, at least on this application, using a copper head gasket we use no sealants etc.
Cheers