Re: Allison 6 Speed GMC 401
My only diesels are a Cummins B series with a mechanical P7100 pump, an NH series mechanical 250HP engine, a few Oldsmobiles with the DB2 pumps and a 6.5 Turbo diesel with a DB4 pump. All parts are dirt cheap for those engines and they are as simple as a rock. Had a couple of early Power Strokes and they seemed reliable.
I do like BB Chevy's and the 496 would be a good choice. Simpler and cheaper to maintain than a Duramax too. Maybe a 478M will come along or even a 637 V8.
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