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Author of "101 Projects"
Join Date: Jan 1995
Location: Rolling Hills Estates, CA
Posts: 27,056
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In general, the early 1977-78 engines are considered slightly better than the later 1980-83 ones. Although they had extra smog equipment (easily removed), they have the larger port heads, which are the desired ones for performance upgrades.
That said, for all intensive purposes, all of the SC engines are basically the same...
-Wayne
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