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9425: indicates that the part is an intake manifold.
K:indicates that it is the 11th revision of the manifold since it was released.
To further narrow down what you have, answer these questions:
is it cast iron or aluminum?
is it a single plane or a dual plane manifold?
what year that would also help?
i do know that it is a fe block
hope this helps.
Last edited by arcticoffroadingfish; Mar 8, 2005 at 12:13 AM.
are you sure that the firing order isnt 15426378 because from what i can find and what you said it coming out of a bus it appears to be a 391 fe to be possitive about this could you tell be if there are vertical castings on the side of the block also they have a steel crank that is huge it requires a lot of machining to fit a standard dampener but i honestly beleive it to be a 391.