I have one as well.
I was told that is was for "Spares" meaning that
it is a replacement engine. Don't know if it is true or
not, but that's the story I got.
Oh, BTW, my "S" engine has a wide port head and high
compression. How about yours?
Brian Borgstede
Some TR250s in St. Louis
----- Original Message -----
From: "Todd Bermudez" <red_tr250@yahoo.com>
> The question I have is the block has the typical
> CC43XXE & then an S stamped in (sideways). I don't
> remember seeing anything about S's stamped on the
> blocks.
>
> Thoughts?
>
> Todd Bermudez
> CD198L
> CD3705L
> CD4364L
> CF25768UO
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