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You are saying that a BB with aluminun heads and intake will be "very close or even a hair under" an all iron SB?
Think you need to do some homework
I meant the small block weight would be close to or slightly under the weight of the big block...if the small block was all iron, and the big block had aluminum heads, aluminum intake, water pump, and any of the other accessories he said were being changed to lower eight. I'm thinking it would be very close, though I don't know for sure.