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the casting number is located on the drivers side at the very back of the block on the top. it will be right above the bell housing. also on the front of the block in front of the head where the head fits on the block will be a series of numbers that will tell you if the engine had a 2 bbl carb. or a 4 bbl carb. and if the car came with ac. again this is on the drivers side.

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Q: Where do you find the Motor number on a 350 Chevy small block 1977?
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