He will be trying to sell it for a long time. If it had the correct intake manifold he might have a better chance. The thermostat hole was offset on the 67 and 68 610 intake manifolds.
Plus, there is no plug hole next to the thermostat hole. That plug hole is where the temp sending unit was located on all 67 Z motors.
No wonder he didn't post the intake part number on the auction, it is wrong.
Rick H.