Wieght difference between small block and big block

HemiMark said

670 with manifolds........... low deck 620........small block..........525

http://www.team.net/sol/tech/engine.html

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but that doesnt take into consideration for aluminum parts. say you gotta all iron 440 VS a small block with aluminum heads, intake and headers. heck that might be 3 fat women worth of difference.