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One easy way for a first check might be to compare manifold gaskets? If they are the same part # it should bolt up I would think. There are the other issues that were mentioned before to look into.
One easy way for a first check might be to compare manifold gaskets? If they are the same part # it should bolt up I would think. There are the other issues that were mentioned before to look into.
I can tell you offhand that the gaskets are not the same part number - the fact that both manifolds share a common gasket doesn't help. You'll get different part numbers for 1987-1990 and 1991-up 4.0, due to the raised intake ports for 1991...