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Old 06-22-2018, 04:45 PM   #3
DieselSJ
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Join Date: Jun 2016
Location: Phoenix, AZ
Posts: 574
Re: I need some advice on which swap I should do. To get better MPG for the money. C3

If you go the route of the 6bt, they can be found with NV4500's attached and you won't need to do any machining.

The 6.2/6.5 will bolt in. HX35 is a great turbo for those and can easily get you into the 250hp/500tq range, which is better than a stock 12v Cummins. Head studs and some good gaskets and you are good to go.
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87 R30 CC Dually, TBI 454, NV4500, zero rust barn find
87 Jeep Grand Wagoneer, 6.5 turbodiesel, 700R4
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