In a message dated 1/21/2010 9:15:30 PM Central Standard Time,
> I have 2 heads from the TR250-TR6 series engines. How do I tell the early
> (TR250) from the late (TR6).
Do you have a manifold gasket? The exhaust ports were moved for the CF
Also, the 74 or later have a port for the EGR Valve. The 73 had the cast
boss for the valve but were not machined. (this is probably the reason for
repositioning the exhaust ports.
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