Dave,
Thanks for your response. The head has been checked and is in good condition
although I'm replacing valves and guides.
I see what you mean about the scallop for the combustion chamber, but the
overhang I was talking about is between the siamesed cylinders. I measured a
spare head I have and the distance between the combustion chambers is
approximately .284" to .290" I also measured two gaskets in the same area
and they were between .305" and .320". That leaves about .020" or .030"
hanging out. I suppose some gaskets are better than others depending on
manufacturer, batch etc. I would just like to know if there is a better
design.
>From the comments I've gotten it looks like I'll be ponying up to Dennis
Welch for a steel gasket, although I would like to know more about the solid
copper version. Even though I will certainly end up with a more durable
gasket either way I would still like to know that there isn't any excess
metal hanging out in the combustion chamber to glow and cause preignition.
My car has a problem with after running and that might be a cause. The solid
copper may be able to be modified to avoid that.
Thanks again.
Bill Lawrence
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