400-390 swap
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Mountain Pass
Joined: Mar 2015
Posts: 184
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400-390 swap
I'm doing my first rebuild, and everything's going good. I'm about to drop my new cab on and start re-wiring. I plan to use the wiring harness from the truck that had the 400, and now running a 390fe. what problems should I expect wiring wise?
thanks in advance, yous have been a huge help.
thanks in advance, yous have been a huge help.
Senior User
Joined: Nov 2004
Posts: 359
Likes: 0
No changes should be nessisary. I went from an fe to a 385 series. Ignition wiring plugged right in alt wiring was the same the only difference was the location of the oil pressure sending unit. One was at the front by the filter the other is behind the carb. Edit: the truck came with an i6 and still no wiring changes
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