Ed Woods wrote:
> List,
>
> I have 2 heads from the TR250-TR6 series engines. How do I tell the early
> (TR250) from the late (TR6).
>
The early heads had slightly narrower spacing on the intake ports, something
like 1.9" between centers, later heads were about 2.2" I can't recall
the year
the air injection ports appeared on the later heads. Exhaust ports
stayed the
same.
mjb.
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