If I were going naturally aspirated I would do the split ports. The SVT manifold works well with this - and I like the looks of the stock SVT engine! It will also save effort with fuel line plumbing.
With a turbocharger, oval port all the way.
99 Tropic Green SVT, Tan Leather, 20K miles, "Nice Twin" (factory stock).
99 Tropic Green SVT, Tan Leather, 28K miles, "Evil Twin" (Turbo AER 3L and more in progress)
96 Red LX, Opal Grey Leather 2.5L, ATX, 22K miles
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