Maybe a long shot but was wondering if this has been done with any real success . Not just port matching which is easy enough but actually opening up the interior a bit. In some searches I have seen Extrude honing and acid being poured into the manifold but I think the latter was mostly for cast iron exhaust manifolds. Both techniques are rather indiscriminate in where they remove material. Did Mopar ever have templates like for the cast iron heads for intake and exhaust manifolds? Pondering for my stroker build.