Round ports are kind of over-rated and I own one. My RAIV cammed, 96 headed D Port 455, with headers made same power about as roller HO I have now (no headers). So they are not some unattainable power thing. After 40 years, they all get rebuilt, and balancing, CR, camming happen on most all these rebuilds, so stock HP numbers are a goofy comparison in a way. Many (most?) do not do spot on stock rebuilds anyway.
And I disagree with above post on WS6 cars handling "no better". Yes they do! (IMO of course). They all handle good, as the F body is a great design. WS6 was a refined package though.
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72 Bird
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