I'm sure you did your research about the Olds 4-bbl manifold, but I know the Oldsmobile 215 was slightly different in the head design. I can't say whether the intake flange was the same or not.
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Hoping to finish a project while I'm still able to push the clutch in.... 
1963 Tempest Convertible (195-1bbl, 3-speed transaxle. 428 RAIV, 5-speed, IRS planned) Pictures
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