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F150 engine swap

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Old Nov 7, 2008 | 12:14 PM
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F150 engine swap

I have a 1990 F250 4x4 extended cab 460 auto that runs great but is extremly rusty. I also have a very clean 1990 F150 4x4 extended cab 5.0 auto that is missing the engine. Is this a pretty straight forward swap to drop the 460 in the F150? If not what challenges am I up against?

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Old Nov 7, 2008 | 12:36 PM
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Depends upon your definition of straight forward. You will need the F250 tranny because the 460 won't mate to the F150 tranny.. not that it would last if it did. You will also need to upgrade the front springs on the F150 to handle the extra weight of the big block.
 
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Old Nov 7, 2008 | 02:19 PM
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I'm mostly concerned about the wiring harness. Can I disconect the F250 with the computer from the fire wall or do I need to dig into the dash? Does the tranny harness need to swapped?
 
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Old Nov 7, 2008 | 02:40 PM
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Since they are both the same year I bet the chassis wiring differences are minimal if any, the engine harness will be pretty much seperate from the chassis harness and use the same connectors. I'd even suspect there are very few if any differences in the engine harness seeing they are both V8's, but it only takes 1 misplaced wire to throw a code or cause operating problems. You'll have to do some comparison of the 2 wiring harnesses and note any obvious differences. If you compare the computer pinouts on this page you can see most everything is on the same pin regardless what engine. Ford Fuel Injection
 
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