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I have a nice original heat stove pipe off a 1972 w30 ram air 455 442, hard to find part, it utilizes a pass thru pin to secure to the shroud, $195 plus $16 shipping in the lower 48 states.
Last edited by 442crzy; Sep 29, 2021 at 07:48 AM.
Reason: Edited ad
Actually they're not. The 71 uses a sheet metal screw to secure to the heat shroud. The 72 uses a keyway cotter that passes through the heat shroud. But visually they look the same.
I was under the understanding that 1970 only utilized 2 sheet metal screws to attach pipe to shroud as opposed to 1971 and 1972 utilized a cotter pin that went straight thru 2 holes to attach pipe to the shroud.
'71 Olds Assembly Manual shows TWO sheet metal screws to hold the pipe on on the 455 cars. If the two holes at the top of the pipe are small ROUND holes then it's from a "cotter pin" car. If two oval holes @approx 10 o'clock and 2 o'clock then it's from a "two screw" years/cars.
