>Why should this matter? I read somewhere "always replace "O" rings."
>on a head job.

The lower o-rings require removal of the cylinders (which requires a
piston ring compressor, which requires (typically) removal of the
engine...) in order to replace them.

Try to not damage the lower o-rings and your head gasket job will be
much less troublesome.

Dave
--
Dave Carpenter

Whatever you wish for me,
May you have twice as much.

"Any sufficiently advanced technology is indistinguishable from
magic." -- Arthur C. Clarke