the 3.5L govener would be set over 1500 rpm lower (the 3.5 is over and done at 4100 rpm, IIRC the 606 will rev to 5500?).

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.