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Hi Paul
Yes mate I have looked at the 6.5 Chev..I have actually rebuilt one only and driven a number on long trips and in play. I am going to try to be positive here and that is really really difficult to do when you are looking at 1940's diesel design. But if you like lazy power with very short revs connected to a manual Nissan gearbox not suited to its short torque curve then they are a great engine as there is no replacement for displacement. But I will warn you this engine is not designed with strength as a paramount virtue. The head has odd smallish runners with odd curves and a manifold that is designed around petrol design and vacuum. But they do react to a turbo quite well but you have a limit as to how much air volume you can pump into the combustion chamber, As pressure doesn't automatically mean volume.
To answer your question that's a yes they do have intake induction system issues, but fixing them is difficult to do with centre V induction.
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