That's what I worry about with a ported lower, how does it flow versus the upper. I'd like an intake ported for my 347, not an Explorer(I have one from you already), but hopefully with thoughtful care about tapering the ports sizes from the inlet and down, somewhat evenly.Definitely reverse taper there........but let's see. We DISCOURAGE porting any GT40/Cobra/Explorer lower beyond a 1250 size head port but we get a lot of requests for 1262 - we try to discourage that and suggest better alternatives. I'm thinking Tony cuts length out of the upper to make up for larger cubes when a more appropriate intake suggestion is more in order. Kudos for the test 96pushrod!
I have an untouched Explorer upper plus that lower, and a used raw Edelbrock RPM II, and the one I want ported to use.