Small Block/Big Block - Internal or External Balanced?
| 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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