The SD is a pretty tame low compression engine in comparison....
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 Current Pontiacs -
1973 Formula SD455 - #'s auto orig paint
1972 Trans Am - 4 speed orig paint
1974 Formula 400 - Ram Air automatic
1966 2+2 convertible - 421 4bbl automatic
1967 Grand Prix - 4 speed orig paint
1967 GTO - 4 speed orig paint 35k orig miles
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