Re: the Navarro Six, O-ring questions

[Tom Jennings <tomj@xxxxxxx>]

Nick or Bruce, I assume you guys know O-ringed heads? I've only
heard of them.  I may have heads that don't match the block... but
I don't know crap about this stuff.

The block still has it's O-rings (copper?) in place. I measure
4.175" groove diameter, approx. .150" from the combustion chamber
(that's a guess, I didn't measure that).

However, the heads are also O-ring'ed, at 4.225" diameter.  That
means the block and head o-rings sit right next to each other,
.025" apart center-to-center. I didn't measure the O-ring thickness,
but it means they probably jam side by side.

Is this right?