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Will a 1987 6.9 diesel fit in a 1993 351 V-8

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Old 03-06-2012, 10:56 PM
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Originally Posted by fordpower46 View Post
Sounds like a lot of work for a minimal gain. A good running 351 can pull almost anything you can put behind it...the limits of the chassis and suspension arrive before the power ends. Remember the 6.9 is not turbocharged.

6.9 Diesel: 170hp, 338lb-ft
5.8 EFI V-8: 210hp, 317lb-ft

The only place you might gain a little is in fuel economy, but that is erased by the higher cost of diesel fuel.
I guess I didn't know the exact numbers that a 6.9 put out for power. But I bet a good exhaust and set of headers for a 5.8 put you're above the torque specs for a stock 6.9

Last edited by GNR22; 03-06-2012 at 10:56 PM. Reason: spelling
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Old 03-10-2012, 05:14 AM
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I would say if the 351 isn't doing it for you then just search for another truck with a diesel already in it. Or the 460 if you don't care about fuel economy. The right gears make a big difference too.
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Old 05-18-2014, 09:43 AM
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Im trying to do the same thing right now but using a 85 6.9 and cab swapped a 89 5.8 and cannot find good wiring diagrams to figure it out. Could you help me out?
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