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Original Message
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| RE: They are diffrent |
| By Dano - 05/15/2004 12:52:20 AM; IP 67.50.228.232 |
| They are different. The 428/427 toploaders use a large input shaft with a coarse spline. The small block's have a smaller diameter input shaft, and finer spline. The 390's from the factory with a toploader use the same spline and diameter input shaft as the small blocks' but they aren't interchangable due to the small block input shaft being slightly longer, which would push the shaft against the crank when useing a small block trans on the 390. If you are building up a 390, use the larger 428/427 style clutch and transmission, it is stronger and bolts right up. The transmissions use the same bolt pattern on the toploader transmission to bellhousing, but of course the small block and big block bellhousings are different. |
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