If you were building a 3.8 and you had a set of split port heads and a set of SC heads and you needed to choose which ones to build up and intake manifold was not an issue, would you start with the late model split port castings or the SC head casting?
Either one would be ported and 1.54 exhaust, 1.85 intake valves would be put in.
Either one would be ported and 1.54 exhaust, 1.85 intake valves would be put in.