btw...with acception to the corners, with a square port w2 intake to a w2 oval is more like the other way around, as in the intake hangs in the heads port window, so less detriment.
No not really, the square port intake was closer to a W5 intake port.
Even Chrysler used big port cast iron intakes from the 360 on the small valve 318 4BBl package. There were two 318 4bbl packages. One had the small port and 1.78 valve while the other had the big port and 1.88 valve. The same intake was used on both packages.