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Small Block/Big Block - Internal or External Balanced?

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The question of whether this engine or that is internally balanced or externally balanced. Here are your answers.

Small Block Chevrolet	Big Block Chevrolet
> 1986 and prior (265/283/302/305/307/327/350) - Internal <	>> W series (348/409) - Internal <<

> 400 small block - External <	>> 396-427 - Internal <<

> 1987-1995 LT1-LT4 Opti-spark) - Internal Front/External Rear <	>> 454-502 - External <<

> 1996-2000 - Internal Front/External Rear <	>> 572 - Internal <<

> LS Engines - Internal <	>> GEN VI <<

> LT Engines (2016 >) - Internal <	>> L18 - External <<

	>> 8.0L Vortec - Internal <<

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