Agree with others that the 9794036 and 9794038 P/Ns are correct for 1968. I'm also noting that the LH P/N for '69 manifold did not change, but the RH P/N did.
It seems to me that most (if not all) '68 RH exhaust manifolds were equipped with a heat riser assy. I'm guessing, but could it be that the RH P/N changed for '69 due to the elimination of the heat riser feature?
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