On Thu, 22 Oct 2009, Al Salvatore wrote:
> Is there any particular difference in the TR6 engine blocks marked HE , used I
> believe in 69.
HE is "High compression" "Engine". For US cars, that 8.5:1
> Also is there any difference in the Circle B head.
Circle B is the foundry mark and Yes, there is at least one difference.
Reportedly the Circle B castings are thicker than the other foundries.
Of course, there's the early head and the late head, but that's not what
you asked.
> Thanks ,
>
> Al
c ya,
rml
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