Thanks guys, yes very weird looking with no divider on the middle ports and would agree it would hurt exhaust flow as would the 3 tube header design.
Rocky no, I don’t have the date from the heads sorry.
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Jim Moshier
1971 Grand Prix 462ci SD Performance 6x heads
1962 Catalina 389
1968 Firebird 400-455 I haven't decided
"If we ever forget that we're one nation under GOD, then we will be a nation gone under." - Ronald Reagan
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