Re: Unleaded Gas
Speaking only for myself, I have never had any problem with these engines on unleaded fuel following a valve grind. As a qualification though, I have not needed to subject any of them to prolonged full-throttle operation.
The above applies only to the earlier engines that had a detachable intake manifold. I have indeed heard stories of problems with the later ones that had integral manifolds, but I have never owned one of those.
Ray
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