Quote:
Originally Posted by Jim Rotella
I don't know if they are exactly the same, but they are being marketed as the same product by the aftermarket people. The squared off, sharp angled shroud used on the Ram Air IV, and '71 and early '72 HO's was replaced by the version pictured above sometime in1972. The SD 455 shroud appears to be the same as the late HO version. It had to be a little bigger because the SD exhaust manifolds are slightly larger than the RA IV and HO manifolds.
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My January build HO lemans has the original squared off shroud.