Re: Allison 6 Speed GMC 401
Years ago I picked up a 401 with an Allison MT40 6 speed attached. The engine was junk, but I had the 6 speed rebuilt and still have it in storage.
Thinking then I'd never find a good 478 (that took another 10 years) I scrapped the componennts to bolt the 6 speed to the GMC engine.
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